| deface | (verb) mar or spoil the appearance of | Synonyms: blemish, disfigure |
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| defacement | (noun) the act of damaging the appearance or surface of something | Synonyms: disfiguration, disfigurement, mutilation |
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| defalcate | (verb) appropriate (as property entrusted to one's care) fraudulently to one's own use | Synonyms: embezzle, malversate, misappropriate, peculate |
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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 | - |
| defalcator | (noun) someone who violates a trust by taking (money) for his own use | Synonyms: embezzler, peculator |
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| 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 |
| defamatory | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, calumnious, denigrating, denigrative, denigratory, libellous, libelous, slanderous |
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| defame | (verb) charge falsely or with malicious intent; attack the good name and reputation of someone | Synonyms: asperse, besmirch, calumniate, denigrate, slander, smear, smirch, sully |
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| defamer | (noun) one who attacks the reputation of another by slander or libel | Synonyms: backbiter, libeler, maligner, slanderer, traducer, vilifier |
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| defang | (verb) remove the fangs from | - |
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| defat | (verb) remove the fat from | - |
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| default | (noun) loss due to not showing up | - |
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| (noun) an option that is selected automatically unless an alternative is specified | Synonyms: default option |
| (noun) loss resulting from failure of a debt to be paid | Synonyms: nonpayment, nonremittal |
| (noun) act of failing to meet a financial obligation | Synonyms: nonpayment, nonremittal |
| (verb) fail to pay up | Synonyms: default on |
| defaulter | (noun) a contestant who forfeits a match | - |
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| (noun) someone who fails to meet a financial obligation | Synonyms: deadbeat |
| (noun) someone who fails to make a required appearance in court | - |
| defeasible | (adjective) capable of being annulled or voided or terminated | - |
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| defeat | (noun) an unsuccessful ending to a struggle or contest | Synonyms: licking |
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| (noun) the feeling that accompanies an experience of being thwarted in attaining your goals | Synonyms: frustration |
| (verb) win a victory over | Synonyms: get the better of, overcome |
| (verb) thwart the passage of | Synonyms: kill, shoot down, vote down, vote out |
| defeated | (adjective) beaten or overcome; not victorious | - |
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| (adjective) disappointingly unsuccessful | Synonyms: disappointed, discomfited, foiled, frustrated, thwarted |
| (noun) people who are defeated | Synonyms: discomfited |
| defeatism | (noun) acceptance of the inevitability of defeat | - |
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| defeatist | (noun) someone who is resigned to defeat without offering positive suggestions | Synonyms: negativist |
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| defecate | (verb) have a bowel movement | Synonyms: ca-ca, crap, make, shit, stool, take a crap, take a shit |
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| defecation | (noun) the elimination of fecal waste through the anus | Synonyms: laxation, shitting |
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| defecator | (noun) (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups. | - |
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| (noun) a person who defecates | Synonyms: shitter, voider |
| defect | (noun) a mark or flaw that spoils the appearance of something (especially on a person's body) | Synonyms: blemish, mar |
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| (noun) a failing or deficiency | Synonyms: shortcoming |
| (noun) an imperfection in an object or machine | Synonyms: fault, flaw |
| (noun) an imperfection in a bodily system | - |
| (verb) desert (a cause, a country or an army), often in order to join the opposing cause, country, or army | Synonyms: desert |
| 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 |
| defective | (adjective) markedly subnormal in structure or function or intelligence or behavior | - |
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| (adjective) having a defect | Synonyms: faulty |
| (adjective) not working properly | Synonyms: bad |
| defectively | (adverb) in a defective manner | - |
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| defectiveness | (noun) the state of being defective | Synonyms: faultiness |
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| defector | (noun) a person who abandons their duty (as on a military post) | Synonyms: deserter |
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| defeminise | (verb) remove the ovaries of (female mammals such as cats) | Synonyms: defeminize |
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| defeminize | (verb) remove the ovaries of (female mammals such as cats) | Synonyms: defeminise |
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| defence | (noun) (military) military action or resources protecting a country against potential enemies | Synonyms: defense, defensive measure |
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| (noun) the act of defending someone or something against attack or injury | Synonyms: defense |
| (noun) a defendant's answer or plea denying the truth of the charges against him | Synonyms: defense, demurrer, denial |
| (noun) protection from harm | Synonyms: defense |
| (noun) a structure used to defend against attack | Synonyms: defense, defensive structure |
| (noun) the justification for some act or belief | Synonyms: defense, vindication |
| (noun) the speech act of answering an attack on your assertions | Synonyms: defense, refutation |
| (noun) the defendant and his legal advisors collectively | Synonyms: defense, defense lawyers, defense team |
| (noun) (sports) the team that is trying to prevent the other team from scoring | Synonyms: defending team, defense |
| (noun) an organization of defenders that provides resistance against attack | Synonyms: defence force, defense, defense force |
| (noun) (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires | Synonyms: defence mechanism, defence reaction, defense, defense mechanism, defense reaction |
| defenceless | (adjective) lacking weapons for self-defense | Synonyms: defenseless |
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| (adjective) lacking protection or support | Synonyms: defenseless |
| (adverb) without defense | Synonyms: defencelessly, defenseless, defenselessly |
| defencelessly | (adverb) without defense | Synonyms: defenceless, defenseless, defenselessly |
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| defencelessness | (noun) the property of being helpless in the face of attack | Synonyms: defenselessness, unprotectedness |
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| defend | (verb) argue or speak in defense of | Synonyms: fend for, support |
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| (verb) state or assert | Synonyms: maintain |
| (verb) be on the defensive; act against an attack | - |
| (verb) protect against a challenge or attack | Synonyms: guard, hold |
| (verb) protect or fight for as a champion | Synonyms: champion |
| (verb) fight against or resist strongly | Synonyms: fight, fight back, fight down, oppose |
| (verb) be the defense counsel for someone in a trial | Synonyms: represent |
| defendable | (adjective) capable of being defended | Synonyms: defensible |
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| defendant | (noun) a person or institution against whom an action is brought in a court of law; the person being sued or accused | Synonyms: suspect |
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| defender | (noun) a person who cares for persons or property | Synonyms: guardian, protector, shielder |
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| (noun) a fighter who holds out against attack | Synonyms: withstander |
| defending | (adjective) attempting to or designed to prevent an opponent from winning or scoring | - |
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| defenestrate | (verb) throw through or out of the window | - |
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| defenestration | (noun) the act of throwing someone or something out of a window | - |
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| defense | (noun) (military) military action or resources protecting a country against potential enemies | Synonyms: defence, defensive measure |
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| (noun) the act of defending someone or something against attack or injury | Synonyms: defence |
| (noun) a defendant's answer or plea denying the truth of the charges against him | Synonyms: defence, demurrer, denial |
| (noun) protection from harm | Synonyms: defence |
| (noun) a structure used to defend against attack | Synonyms: defence, defensive structure |
| (noun) the justification for some act or belief | Synonyms: defence, vindication |
| (noun) the speech act of answering an attack on your assertions | Synonyms: defence, refutation |
| (noun) the defendant and his legal advisors collectively | Synonyms: defence, defense lawyers, defense team |
| (noun) (sports) the team that is trying to prevent the other team from scoring | Synonyms: defence, defending team |
| (noun) an organization of defenders that provides resistance against attack | Synonyms: defence, defence force, defense force |
| (noun) (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires | Synonyms: defence, defence mechanism, defence reaction, defense mechanism, defense reaction |
| defenseless | (adjective) lacking weapons for self-defense | Synonyms: defenceless |
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| (adjective) having no protecting or concealing cover | Synonyms: naked |
| (adjective) lacking protection or support | Synonyms: defenceless |
| (adverb) without defense | Synonyms: defenceless, defencelessly, defenselessly |
| defenselessly | (adverb) without defense | Synonyms: defenceless, defencelessly, defenseless |
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| defenselessness | (noun) the property of being helpless in the face of attack | Synonyms: defencelessness, unprotectedness |
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| defensibility | (noun) capability of being defended | - |
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| defensible | (adjective) capable of being defended | Synonyms: defendable |
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| defensive | (adjective) intended or appropriate for defending against or deterring aggression or attack | - |
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| (adjective) attempting to justify or defend in speech or writing | Synonyms: justificative, justificatory |
| (noun) an attitude of defensiveness | Synonyms: defensive attitude |
| 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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