| defensively | (adverb) in a defensive manner | - |
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| (adverb) in an apologetic and defensive manner | - |
| defensiveness | (noun) excessive sensitivity to criticism | - |
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| defer | (verb) yield to another's wish or opinion | Synonyms: accede, bow, give in, submit |
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| (verb) hold back to a later time | Synonyms: hold over, postpone, prorogue, put off, put over, remit, set back, shelve, table |
| deference | (noun) a courteous expression (by word or deed) of esteem or regard | Synonyms: respect |
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| (noun) a disposition or tendency to yield to the will of others | Synonyms: complaisance, compliance, compliancy, obligingness |
| (noun) courteous regard for people's feelings | Synonyms: respect, respectfulness |
| deferent | (adjective) showing deference | Synonyms: deferential, regardful |
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| deferential | (adjective) showing deference | Synonyms: deferent, regardful |
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| deferentially | (adverb) in a respectfully deferential manner | - |
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| (adverb) in a servile manner | Synonyms: submissively |
| deferment | (noun) act of putting off to a future time | Synonyms: deferral, postponement |
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| deferral | (noun) act of putting off to a future time | Synonyms: deferment, postponement |
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| (noun) a state of abeyance or suspended business | Synonyms: recess |
| defervesce | (verb) experience an abatement of a fever | - |
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| defervescence | (noun) abatement of a fever as indicated by a reduction in body temperature | - |
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| defervescent | (adjective) of or relating to the reduction of a fever | - |
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| defiance | (noun) a defiant act | - |
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| (noun) intentionally contemptuous behavior or attitude | Synonyms: rebelliousness |
| (noun) a hostile challenge | - |
| defiant | (adjective) boldly resisting authority or an opposing force | Synonyms: noncompliant |
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| defiantly | (adverb) in a rebellious manner | Synonyms: contumaciously, rebelliously |
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| defibrillate | (verb) stop the fibrillation and restore normal contractions, usually by means of electric shocks | - |
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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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| defibrillator | (noun) an electronic device that administers an electric shock of preset voltage to the heart through the chest wall in an attempt to restore the normal rhythm of the heart during ventricular fibrillation | - |
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| defibrinate | (verb) remove fibrin from (blood) | - |
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| deficiency | (noun) lack of an adequate quantity or number | Synonyms: inadequacy, insufficiency |
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| (noun) the state of needing something that is absent or unavailable | Synonyms: lack, want |
| deficient | (adjective) of a quantity not able to fulfill a need or requirement | Synonyms: insufficient |
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| (adjective) inadequate in amount or degree | Synonyms: lacking, wanting |
| (adjective) falling short of some prescribed norm | Synonyms: inferior, substandard |
| deficit | (noun) the property of being an amount by which something is less than expected or required | Synonyms: shortage, shortfall |
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| (noun) an excess of liabilities over assets (usually over a certain period) | - |
| (noun) (sports) the score by which a team or individual is losing | - |
| (noun) a deficiency or failure in neurological or mental functioning | - |
| defilade | (noun) the arrangement of defensive fortifications to protect against enemy fire | - |
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| defile | (noun) a narrow pass (especially one between mountains) | Synonyms: gorge |
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| (verb) spot, stain, or pollute | Synonyms: befoul, foul, maculate |
| (verb) make dirty or spotty, as by exposure to air; also used metaphorically | Synonyms: maculate, stain, sully, tarnish |
| (verb) place under suspicion or cast doubt upon | Synonyms: cloud, corrupt, sully, taint |
| defiled | (adjective) morally blemished; stained or impure | Synonyms: maculate |
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| defilement | (noun) the state of being polluted | Synonyms: befoulment, pollution |
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| defiler | (noun) a person or organization that causes pollution of the environment | Synonyms: polluter |
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| definability | (noun) the quality or state of being capable of being defined, limited, or explained. | - |
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| definable | (adjective) capable of being defined, limited, or explained | - |
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| define | (verb) give a definition for the meaning of a word | - |
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| (verb) decide upon or fix definitely | Synonyms: determine, fix, limit, set, specify |
| (verb) determine the essential quality of | Synonyms: delimit, delimitate, delineate, specify |
| (verb) determine the nature of | - |
| (verb) show the form or outline of | Synonyms: delineate |
| defined | (adjective) clearly characterized or delimited | - |
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| (adjective) showing clearly the outline or profile or boundary | Synonyms: outlined |
| defining | (noun) any process serving to define the shape of something | Synonyms: shaping |
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| definite | (adjective) precise; explicit and clearly defined | - |
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| (adjective) known for certain | - |
| definitely | (adverb) without question and beyond doubt | Synonyms: by all odds, decidedly, emphatically, in spades, unquestionably |
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| definiteness | (noun) the quality of being predictable with great confidence | Synonyms: determinateness |
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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 | - |
| definitive | (adjective) supplying or being a final or conclusive settlement | Synonyms: determinate |
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| (adjective) clearly defined or formulated | Synonyms: unequivocal |
| (adjective) of recognized authority or excellence | Synonyms: authoritative |
| definitors | (noun) council in a religious order who provide counsel and assistance to the superiors general and provincial superior of their order. | - |
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| deflagrate | (verb) burn with great heat and intense light | - |
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| (verb) cause to burn rapidly and with great intensity | - |
| 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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| deflate | (verb) become deflated or flaccid, as by losing air | - |
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| (verb) reduce or cut back the amount or availability of, creating a decline in value or prices | - |
| (verb) produce deflation in | - |
| (verb) reduce or lessen the size or importance of | Synonyms: puncture |
| (verb) release contained air or gas from | - |
| (verb) collapse by releasing contained air or gas | - |
| deflated | (adjective) brought low in spirit | Synonyms: chapfallen, chopfallen, crestfallen |
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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 | - |
| deflationary | (adjective) associated with or tending to cause decreases in consumer prices or increases in the purchasing power of money | - |
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| deflator | (noun) a statistical factor designed to remove the effect of inflation; inflation adjusted variables are in constant dollars | - |
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| deflect | (verb) impede the movement of (an opponent or a ball) | Synonyms: block, parry |
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| (verb) draw someone's attention away from something | Synonyms: distract |
| (verb) turn aside and away from an initial or intended course | - |
| (verb) turn from a straight course, fixed direction, or line of interest | Synonyms: bend, turn away |
| (verb) prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off | Synonyms: avert, avoid, debar, fend off, forefend, forfend, head off, obviate, stave off, ward off |
| 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 |
| deflective | (adjective) capable of changing the direction (of a light or sound wave) | Synonyms: refractive |
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| deflector | (noun) a device intended to turn aside the flow of something (water or air or smoke etc) | - |
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| 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 | - |
| deflower | (verb) make imperfect | Synonyms: impair, mar, spoil, vitiate |
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| (verb) deprive of virginity | Synonyms: ruin |
| defog | (verb) free from mist | Synonyms: demist |
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| defoliant | (noun) a chemical that is sprayed on plants and causes their leaves to fall off | - |
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| defoliate | (adjective) deprived of leaves | Synonyms: defoliated |
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| (verb) strip the leaves or branches from | - |
| defoliated | (adjective) deprived of leaves | Synonyms: defoliate |
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| 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 | - |
| defoliator | (noun) an insect that strips the leaves from plants | - |
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| deforest | (verb) remove the trees from | Synonyms: disafforest, disforest |
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| deforestation | (noun) the removal of trees | Synonyms: disforestation |
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| (noun) the state of being clear of trees | - |
| deform | (verb) become misshapen | - |
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| (verb) alter the shape of (something) by stress | Synonyms: distort, strain |
| (verb) assume a different shape or form | Synonyms: change form, change shape |
| (verb) make formless | - |
| (verb) cause (an object) to assume a crooked or angular form | Synonyms: bend, flex, turn, twist |
| (verb) twist and press out of shape | Synonyms: contort, distort, wring |
| 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 | - |
| deformational | (adjective) relating to or causing change in either shape or size of a material body or geometric figure | - |
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| deformed | (adjective) so badly formed or out of shape as to be ugly | Synonyms: distorted, ill-shapen, malformed, misshapen |
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| deformity | (noun) an appearance that has been spoiled or is misshapen | Synonyms: disfiguration, disfigurement |
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| (noun) an affliction in which some part of the body is misshapen or malformed | Synonyms: malformation, misshapenness |
| defraud | (verb) deprive of by deceit | Synonyms: bunco, con, diddle, goldbrick, hornswoggle, mulct, nobble, rook, scam, short-change, swindle, victimize |
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| defrauder | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseler, chiseller, gouger, grifter, scammer, swindler |
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| defray | (verb) bear the expenses of | - |
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| defrayal | (noun) the act of paying money | Synonyms: defrayment, payment |
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| defrayment | (noun) the act of paying money | Synonyms: defrayal, payment |
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| defrock | (verb) divest of the frock; of church officials | Synonyms: unfrock |
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| defrost | (verb) make or become free of frost or ice | Synonyms: de-ice, deice |
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| defroster | (noun) heater that removes ice or frost (as from a windshield or a refrigerator or the wings of an airplane) | Synonyms: deicer |
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| deft | (adjective) skillful in physical movements; especially of the hands | Synonyms: dexterous, dextrous |
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| deftly | (adverb) in a deft manner | - |
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| (adverb) with dexterity; in a dexterous manner | Synonyms: dexterously, dextrously |
| deftness | (noun) skillful performance or ability without difficulty | Synonyms: adeptness, adroitness, facility, quickness |
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| defunct | (adjective) having ceased to exist or live | - |
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| (adjective) no longer in force or use; inactive | - |
| defunctness | (noun) no longer in existence | Synonyms: extinction |
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| defuse | (verb) remove the triggering device from | - |
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| defusing | (noun) the act of deactivating or making ineffective (as a bomb) | Synonyms: deactivation |
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| defy | (verb) challenge | Synonyms: dare |
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| (verb) resist or confront with resistance | Synonyms: hold, hold up, withstand |
| (verb) elude, especially in a baffling way | Synonyms: refuse, resist |
| degage | (adjective) free and relaxed in manner | - |
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| (adjective) showing lack of emotional involvement | Synonyms: detached, uninvolved |
| degas | (verb) remove gas from | - |
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| degauss | (verb) make nonmagnetic; take away the magnetic properties (of) | Synonyms: demagnetise, demagnetize |
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| degaussing | (noun) the process of making a (steel) ship's hull nonmagnetic by producing an opposing magnetic field | - |
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| degeneracy | (noun) moral perversion; impairment of virtue and moral principles | Synonyms: corruption, depravation, depravity, putrefaction |
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| (noun) the state of being degenerate in mental or moral qualities | Synonyms: decadence, decadency, degeneration |
| degenerate | (adjective) unrestrained by convention or morality | Synonyms: debauched, degraded, dissipated, dissolute, fast, libertine, profligate, riotous |
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| (noun) a person whose behavior deviates from what is acceptable especially in sexual behavior | Synonyms: deviant, deviate, perv, perve, pervert |
| (verb) grow progressively worse | Synonyms: deteriorate, devolve, drop |
| 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 |
| degenerative | (adjective) (of illness) marked by gradual deterioration of organs and cells along with loss of function | - |
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| deglaze | (verb) dissolve cooking juices or solid food in (a pan) by adding liquid and stirring | - |
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| deglutition | (noun) the act of swallowing | Synonyms: drink, swallow |
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| deglycerolise | (verb) remove from glycerol | Synonyms: deglycerolize |
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| deglycerolize | (verb) remove from glycerol | Synonyms: deglycerolise |
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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 |
| degrade | (verb) lower the grade of something; reduce its worth | Synonyms: cheapen |
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| (verb) reduce the level of land, as by erosion | - |
| (verb) reduce in worth or character, usually verbally | Synonyms: demean, disgrace, put down, take down |
| degraded | (adjective) unrestrained by convention or morality | Synonyms: debauched, degenerate, dissipated, dissolute, fast, libertine, profligate, riotous |
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| (adjective) lowered in value | Synonyms: debased, devalued |
| degrader | (noun) a person who lowers the quality or character or value (as by adding cheaper metal to coins) | Synonyms: debaser |
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| degrading | (adjective) used of conduct; characterized by dishonor | Synonyms: debasing |
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| (adjective) harmful to the mind or morals | Synonyms: corrupting |
| degras | (noun) a semisolid emulsion produced by the treatment of certain skins with oxidized fish oil, which extracts their soluble albuminoids. | - |
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| degrease | (verb) remove grease or oil from (a pan) | - |
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