| dacryon | (noun) the craniometric point at the junction of the anterior border of the lacrimal bone with the frontal bone | - |
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| daemon | (noun) an evil supernatural being | Synonyms: daimon, demon, devil, fiend |
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| (noun) a person who is part mortal and part god | Synonyms: demigod |
| daikon | (noun) radish of Japan with a long hard durable root eaten raw or cooked | Synonyms: Japanese radish, radish, Raphanus sativus longipinnatus |
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| daimon | (noun) an evil supernatural being | Synonyms: daemon, demon, devil, fiend |
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| dairyman | (noun) the owner or manager of a dairy | Synonyms: dairy farmer |
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| (noun) a man who works in a dairy | - |
| dalesman | (noun) a person who lives in the dales of northern England | - |
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| dalmatian | (noun) a large breed having a smooth white coat with black or brown spots; originated in Dalmatia | Synonyms: carriage dog, coach dog |
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| damn | (adjective) used as expletives | Synonyms: goddamn |
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| (adjective) expletives used informally as intensifiers | Synonyms: blame, blamed, blasted, blessed, damned, darned, deuced, goddam, goddamn, goddamned, infernal |
| (noun) something of little value | Synonyms: darn, hoot, red cent, shit, shucks, tinker's dam, tinker's damn |
| (adverb) extremely | Synonyms: all-fired, all-firedly, bloody |
| (verb) wish harm upon; invoke evil upon | Synonyms: anathemise, anathemize, bedamn, beshrew, curse, imprecate, maledict |
| damnation | (noun) the act of damning | - |
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| (noun) the state of being condemned to eternal punishment in Hell | Synonyms: eternal damnation |
| dampen | (verb) lessen in force or effect | Synonyms: break, damp, soften, weaken |
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| (verb) make moist | Synonyms: moisten, wash |
| (verb) check; keep in check (a fire) | - |
| (verb) make vague or obscure or make (an image) less visible | Synonyms: damp, deaden |
| (verb) reduce the amplitude (of oscillations or waves) | - |
| (verb) suppress or constrain so as to lessen in intensity | Synonyms: stifle |
| (verb) deaden (a sound or noise), especially by wrapping | Synonyms: damp, dull, muffle, mute, tone down |
| damson | (noun) dark purple plum of the damson tree | Synonyms: damson plum |
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| dandelion | (noun) any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls | Synonyms: blowball |
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| darken | (verb) become dark or darker | - |
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| (verb) make dark or darker | - |
| (verb) tarnish or stain | - |
| darn | (noun) sewing that repairs a worn or torn hole (especially in a garment) | Synonyms: mend, patch |
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| (noun) something of little value | Synonyms: damn, hoot, red cent, shit, shucks, tinker's dam, tinker's damn |
| (verb) repair by sewing | - |
| dasheen | (noun) tropical starchy tuberous root | Synonyms: cocoyam, edda, taro, taro root |
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| (noun) herb of the Pacific islands grown throughout the tropics for its edible root and in temperate areas as an ornamental for its large glossy leaves | Synonyms: Colocasia esculenta, dalo, taro, taro plant |
| (noun) edible starchy tuberous root of taro plants | Synonyms: cocoyam, eddo, taro |
| dauphin | (noun) formerly, the eldest son of the King of France and direct heir to the throne | - |
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| dawn | (noun) the earliest period | Synonyms: morning |
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| (noun) the first light of day | Synonyms: aurora, break of day, break of the day, cockcrow, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
| (noun) an opening time period | - |
| (verb) become light | - |
| (verb) become clear or enter one's consciousness or emotions | Synonyms: click, come home, fall into place, get across, get through, penetrate, sink in |
| (verb) appear or develop | - |
| deaccession | (verb) sell (art works) from a collection, especially in order to raise money for the purchase of other art works | - |
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| deacon | (noun) a cleric ranking just below a priest in Christian churches; one of the Holy Orders | - |
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| (noun) a Protestant layman who assists the minister | Synonyms: Protestant deacon |
| deactivation | (noun) the act of deactivating or making ineffective (as a bomb) | Synonyms: defusing |
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| (noun) breaking up a military unit (by transfers or discharges) | Synonyms: inactivation |
| deaden | (verb) become lifeless, less lively, intense, or active; lose life, force, or vigor | - |
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| (verb) make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation | Synonyms: blunt |
| (verb) lessen the momentum or velocity of | - |
| (verb) make vapid or deprive of spirit | - |
| (verb) convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil | - |
| (verb) make vague or obscure or make (an image) less visible | Synonyms: damp, dampen |
| (verb) cut a girdle around so as to kill by interrupting the circulation of water and nutrients | Synonyms: girdle |
| deadpan | (adjective) deliberately impassive in manner | Synonyms: expressionless, impassive, poker-faced, unexpressive |
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| (adverb) without betraying any feeling | - |
| deafen | (verb) make soundproof | - |
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| (verb) make or render deaf | Synonyms: deaf |
| (verb) be unbearably loud | - |
| deamination | (noun) removal of the amino radical from an amino acid or other amino compound | Synonyms: deaminization |
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| deaminization | (noun) removal of the amino radical from an amino acid or other amino compound | Synonyms: deamination |
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| dean | (noun) an administrator in charge of a division of a university or college | - |
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| (noun) (Roman Catholic Church) the head of the College of Cardinals | - |
| (noun) a man who is the senior member of a group | Synonyms: doyen |
| debarkation | (noun) the act of passengers and crew getting off of a ship or aircraft | Synonyms: disembarkation, disembarkment |
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| debilitation | (noun) serious weakening and loss of energy | Synonyms: enervation, enfeeblement, exhaustion |
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| decagon | (noun) a polygon with 10 sides and 10 angles | - |
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| decahedron | (noun) any polyhedron having ten plane faces | - |
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| decalcification | (noun) loss of calcium from bones or teeth | - |
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| decantation | (noun) the act of gently pouring off a clear liquor (as from its original bottle) without disturbing the lees | - |
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| decapitation | (noun) killing by cutting off the head | Synonyms: beheading |
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| (noun) execution by cutting off the victim's head | Synonyms: beheading |
| decarboxylation | (noun) the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen) | - |
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| decathlon | (noun) an athletic contest consisting of ten different events | - |
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| deceleration | (noun) the act of decelerating; decreasing the speed | - |
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| (noun) a decrease in rate of change | Synonyms: retardation, slowing |
| (noun) (physics) a rate of decrease in velocity | - |
| decentalisation | (noun) the social process in which population and industry moves from urban centers to outlying districts | Synonyms: decentralization |
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| decentralisation | (noun) the spread of power away from the center to local branches or governments | Synonyms: decentralization |
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| decentralization | (noun) the spread of power away from the center to local branches or governments | Synonyms: decentralisation |
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| (noun) the social process in which population and industry moves from urban centers to outlying districts | Synonyms: decentalisation |
| decentration | (noun) Jean Piaget's theory of cognitive development where a child slowly moves away from an egocentric world to a world shared with others. | Synonyms: decentering |
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| deception | (noun) the act of deceiving | Synonyms: deceit, dissembling, dissimulation |
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| (noun) an illusory feat; considered magical by naive observers | Synonyms: conjuration, conjuring trick, illusion, legerdemain, magic, magic trick, thaumaturgy, trick |
| (noun) a misleading falsehood | Synonyms: deceit, misrepresentation |
| deciban | (noun) a unit of information, one tenth of a ban. | - |
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| decimalisation | (noun) the act of changing to a decimal system | Synonyms: decimalization |
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| decimalization | (noun) the act of changing to a decimal system | Synonyms: decimalisation |
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| decimation | (noun) destroying or killing a large part of the population | - |
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| decision | (noun) the act of making up your mind about something | Synonyms: conclusion, determination |
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| (noun) the trait of resoluteness as evidenced by firmness of character or purpose | Synonyms: decisiveness |
| (noun) a position or opinion or judgment reached after consideration | Synonyms: conclusion, determination |
| (noun) the outcome of a game or contest | - |
| (noun) (boxing) a victory won on points when no knockout has occurred | - |
| declamation | (noun) vehement oratory | - |
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| (noun) recitation of a speech from memory with studied gestures and intonation as an exercise in elocution or rhetoric | - |
| declaration | (noun) a statement that is emphatic and explicit (spoken or written) | - |
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| (noun) a formal expression by a meeting; agreed to by a vote | Synonyms: resolution, resolve |
| (noun) (law) unsworn statement that can be admitted in evidence in a legal transaction | - |
| (noun) a formal public statement | Synonyms: announcement, annunciation, proclamation |
| (noun) (contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make | Synonyms: contract |
| (noun) a statement of taxable goods or of dutiable properties | - |
| declassification | (noun) reduction or removal by the government of restrictions on a classified document or weapon | - |
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| declension | (noun) a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms | - |
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| (noun) a downward slope or bend | Synonyms: declination, decline, declivity, descent, downslope, fall |
| (noun) process of changing to an inferior state | Synonyms: decline in quality, deterioration, worsening |
| (noun) the inflection of nouns and pronouns and adjectives in Indo-European languages | - |
| declination | (noun) a polite refusal of an invitation | Synonyms: regrets |
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| (noun) (astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere | Synonyms: celestial latitude, dec |
| (noun) a downward slope or bend | Synonyms: declension, decline, declivity, descent, downslope, fall |
| (noun) a condition inferior to an earlier condition; a gradual falling off from a better state; decline | Synonyms: decline |
| decoction | (noun) (pharmacology) the extraction of water-soluble drug substances by boiling | - |
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| decolonisation | (noun) the action of changing from colonial to independent status | Synonyms: decolonization |
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| decolonization | (noun) the action of changing from colonial to independent status | Synonyms: decolonisation |
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| decommission | (verb) withdraw from active service | - |
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| decomposition | (noun) the analysis of a vector field | Synonyms: vector decomposition |
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| (noun) the organic phenomenon of rotting | Synonyms: decay |
| (noun) (biology) the process of decay caused by bacterial or fungal action | Synonyms: breakdown, putrefaction, rot, rotting |
| (noun) (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance | Synonyms: breakdown, chemical decomposition reaction, decomposition reaction |
| (noun) in a decomposed state | Synonyms: disintegration |
| decompression | (noun) relieving pressure (especially bringing a compressed person gradually back to atmospheric pressure) | Synonyms: decompressing |
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| (noun) restoring compressed information to its normal form for use or display | - |
| deconstruction | (noun) a philosophical theory of criticism (usually of literature or film) that seeks to expose deep-seated contradictions in a work by delving below its surface meaning | Synonyms: deconstructionism |
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| decontamination | (noun) the removal of contaminants | - |
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| decoration | (noun) the act of decorating something (in the hope of making it more attractive) | - |
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| (noun) something used to beautify | Synonyms: ornament, ornamentation |
| (noun) an award for winning a championship or commemorating some other event | Synonyms: laurel wreath, medal, medallion, palm, ribbon |
| decortication | (noun) removal of the outer covering of an organ or part | - |
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| decrementation | (noun) the operation of subtracting one from the operand. | - |
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| decrepitation | (noun) the crackling or breaking up of certain crystals when they are heated | - |
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| decriminalisation | (noun) legislation that makes something legal that was formerly illegal | Synonyms: decriminalization |
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| decriminalization | (noun) legislation that makes something legal that was formerly illegal | Synonyms: decriminalisation |
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| decryption | (noun) the activity of making clear or converting from code into plain text | Synonyms: decipherment, decoding |
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| decussation | (noun) an intersection or crossing of two tracts in the form of the letter X | Synonyms: chiasm, chiasma |
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| dedication | (noun) the act of binding yourself (intellectually or emotionally) to a course of action | Synonyms: allegiance, commitment, loyalty |
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| (noun) complete and wholehearted fidelity | - |
| (noun) a short message (as in a book or musical work or on a photograph) dedicating it to someone or something | Synonyms: inscription |
| (noun) a message that makes a pledge | Synonyms: commitment |
| (noun) a ceremony in which something (as a building) is dedicated to some goal or purpose | - |
| dedifferentiation | (noun) the loss of specialization in form or function | - |
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| deduction | (noun) the act of subtracting (removing a part from the whole) | Synonyms: subtraction |
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| (noun) the act of reducing the selling price of merchandise | Synonyms: discount, price reduction |
| (noun) reasoning from the general to the particular (or from cause to effect) | Synonyms: deductive reasoning, synthesis |
| (noun) something that is inferred (deduced or entailed or implied) | Synonyms: entailment, implication |
| (noun) an amount or percentage deducted | Synonyms: discount |
| (noun) a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket | Synonyms: tax deduction, tax write-off |
| deepen | (verb) become more intense | Synonyms: intensify |
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| (verb) make more intense, stronger, or more marked | Synonyms: compound, heighten, intensify |
| (verb) become deeper in tone | Synonyms: change |
| (verb) make deeper | - |
| deerskin | (noun) leather from the hide of a deer | - |
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| defalcation | (noun) the fraudulent appropriation of funds or property entrusted to your care but actually owned by someone else | Synonyms: embezzlement, misapplication, misappropriation, peculation |
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| (noun) the sum of money that is misappropriated | - |
| defamation | (noun) an abusive attack on a person's character or good name | Synonyms: aspersion, calumny, denigration, slander |
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| (noun) a false accusation of an offense or a malicious misrepresentation of someone's words or actions | Synonyms: calumniation, calumny, hatchet job, obloquy, traducement |
| defecation | (noun) the elimination of fecal waste through the anus | Synonyms: laxation, shitting |
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| defection | (noun) withdrawing support or help despite allegiance or responsibility | Synonyms: abandonment, desertion |
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| (noun) the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes) | Synonyms: apostasy, renunciation |
| defenestration | (noun) the act of throwing someone or something out of a window | - |
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| defibrillation | (noun) treatment by stopping fibrillation of heart muscles (usually by electric shock delivered by a defibrillator) | - |
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| definition | (noun) clarity of outline | - |
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| (noun) a concise explanation of the meaning of a word or phrase or symbol | - |
| deflagration | (noun) combustion that propagates through a gas or along the surface of an explosive at a rapid rate driven by the transfer of heat | - |
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| deflation | (noun) the act of letting the air out of something | - |
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| (noun) a contraction of economic activity resulting in a decline of prices | - |
| (noun) (geology) the erosion of soil as a consequence of sand and dust and loose rocks being removed by the wind | - |
| deflection | (noun) a turning aside (of your course or attention or concern) | Synonyms: deflexion, deviation, digression, divagation, diversion |
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| (noun) the property of being bent or deflected | Synonyms: bending, deflexion |
| (noun) the amount by which a propagating wave is bent | Synonyms: deflexion, refraction |
| (noun) the movement of the pointer or pen of a measuring instrument from its zero position | Synonyms: deflexion |
| (noun) a twist or aberration; especially a perverse or abnormal way of judging or acting | Synonyms: warp |
| deflexion | (noun) a turning aside (of your course or attention or concern) | Synonyms: deflection, deviation, digression, divagation, diversion |
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| (noun) the property of being bent or deflected | Synonyms: bending, deflection |
| (noun) the amount by which a propagating wave is bent | Synonyms: deflection, refraction |
| (noun) the movement of the pointer or pen of a measuring instrument from its zero position | Synonyms: deflection |
| defloration | (noun) the act of depriving a woman of her virginity (especially by rupturing the hymen through sexual intercourse) | - |
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| (noun) an act that despoils the innocence or beauty of something | - |
| defoliation | (noun) causing the leaves of trees and other plants to fall off (as by the use of chemicals) | - |
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| (noun) the loss of foliage | - |
| deforestation | (noun) the removal of trees | Synonyms: disforestation |
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| (noun) the state of being clear of trees | - |
| deformation | (noun) the act of twisting or deforming the shape of something (e.g., yourself) | Synonyms: contortion |
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| (noun) a change for the worse | Synonyms: distortion |
| (noun) alteration in the shape or dimensions of an object as a result of the application of stress to it | - |
| degeneration | (noun) passing from a more complex to a simpler biological form | Synonyms: retrogression |
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| (noun) the process of declining from a higher to a lower level of effective power or vitality or essential quality | Synonyms: devolution |
| (noun) the state of being degenerate in mental or moral qualities | Synonyms: decadence, decadency, degeneracy |
| deglutition | (noun) the act of swallowing | Synonyms: drink, swallow |
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| degradation | (noun) changing to a lower state (a less respected state) | Synonyms: debasement |
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| (noun) a low or downcast state | Synonyms: abasement, abjection |
| degustation | (noun) taking a small amount into the mouth to test its quality | Synonyms: relishing, savoring, savouring, tasting |
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| dehorn | (verb) take the horns off (an animal) | - |
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| (verb) prevent the growth of horns of certain animals | - |
| dehumanisation | (noun) the act of degrading people with respect to their best qualities | Synonyms: dehumanization |
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| dehumanization | (noun) the act of degrading people with respect to their best qualities | Synonyms: dehumanisation |
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| dehydration | (noun) the process of extracting moisture | Synonyms: desiccation, drying up, evaporation |
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| (noun) dryness resulting from the removal of water | Synonyms: desiccation |
| (noun) depletion of bodily fluids | - |
| deification | (noun) the elevation of a person (as to the status of a god) | Synonyms: apotheosis, exaltation |
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| (noun) an embodiment of the qualities of a god | - |
| (noun) the condition of being treated like a god | - |
| deign | (verb) do something that one considers to be below one's dignity | Synonyms: condescend, descend |
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| dejection | (noun) a state of melancholy depression | - |
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| (noun) solid excretory product evacuated from the bowels | Synonyms: BM, faecal matter, faeces, fecal matter, feces, ordure, stool |
| delabialization | (noun) the pronouncing of a sound without lip rounding. | - |
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| delectation | (noun) act of receiving pleasure from something | Synonyms: enjoyment |
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| (noun) a feeling of extreme pleasure or satisfaction | Synonyms: delight |