defender, n. defendant, [vindicator], [advocate], [champion], [pleader], asserter, upholder, [guardian].
defense, n. [protection], defending, [maintenance]; [guard], [protection], palisade, [rampart], [bulwark], [fortress], blockhouse, [fortification], [earthwork], breastwork, [shield], [armor], stockade, buckler, redoubt, remblai, palladium, garrison, ravelin, [reliance], muniment, machicolation; [vindication], advocacy, [plea], [excuse]. Antonyms: [betrayal], [exposure], [surrender], [abandonment], capitulation.
defiance, n. [challenge], provocation; [opposition], insubmission, contumacy, [contempt], insubordination, [insurgency], [mutiny], [rebellion], recalcitration.
defiant, a. [disobedient], insubmissive, contumacious, [bellicose], [rebellious], contumelious, [refractory], [cockahoop], [mutinous]. Antonyms: [obedient], tractable, [submissive].
deficiency, n. inadequacy, [insufficiency], [shortage], meagreness.
deficient, a. defective, [imperfect], meagre, [scanty], [inadequate], [insufficient].
defile, v. [contaminate], [pollute], [soil], befoul, [vitiate], [taint], [corrupt], infect, sully.
defilement, n. [contamination], [pollution], [vitiation], [corruption].
definite, a. [positive], [specific], [express], explicit, specified, [exact], [precise]. Antonyms: See indefinite.
definition, n. [explanation], [description]; lexigraphy.