Negate - Definition

v 1: be in contradiction with [syn: contradict, belie,
negate]
2: deny the truth of [syn: contradict, negate, contravene]
3: prove negative; show to be false [syn: negate,
contradict] [ant: affirm, confirm, corroborate,
substantiate, support, sustain]
4: make ineffective by counterbalancing the effect of; "Her
optimism neutralizes his gloom"; "This action will negate the
effect of my efforts" [syn: neutralize, neutralise,
nullify, negate]