| defacement | (noun) the act of damaging the appearance or surface of something | Synonyms: disfiguration, disfigurement, mutilation |
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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 |
| defamer | (noun) one who attacks the reputation of another by slander or libel | Synonyms: backbiter, libeler, maligner, slanderer, traducer, vilifier |
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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 |
| 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 | - |
| 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 |
| defeated | (noun) people who are defeated | Synonyms: discomfited |
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| 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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| 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 | - |
| 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 |
| 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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| 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 |
| defencelessness | (noun) the property of being helpless in the face of attack | Synonyms: defenselessness, unprotectedness |
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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 |
| 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 |
| 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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| defensive | (noun) an attitude of defensiveness | Synonyms: defensive attitude |
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| defensiveness | (noun) excessive sensitivity to criticism | - |
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| 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 |
| 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 |
| defervescence | (noun) abatement of a fever as indicated by a reduction in body temperature | - |
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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 | - |
| 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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| 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 |
| 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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| 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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| defining | (noun) any process serving to define the shape of something | Synonyms: shaping |
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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 | - |
| 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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| 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 | - |
| deflator | (noun) a statistical factor designed to remove the effect of inflation; inflation adjusted variables are in constant dollars | - |
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| 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 |
| 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 | - |
| defoliant | (noun) a chemical that is sprayed on plants and causes their leaves to fall off | - |
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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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| 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 | - |
| 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 |
| defrauder | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseler, chiseller, gouger, grifter, scammer, swindler |
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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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| 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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| deftness | (noun) skillful performance or ability without difficulty | Synonyms: adeptness, adroitness, facility, quickness |
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| defunctness | (noun) no longer in existence | Synonyms: extinction |
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| defusing | (noun) the act of deactivating or making ineffective (as a bomb) | Synonyms: deactivation |
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