definition of
negate

[1] #1 negate v. [contradict, belie] be in contradiction with. wn

[2] #2 negate v. [contradict, contravene] deny the truth of. wn

[3] #3 negate v. [contradict] prove negative; show to be false. wn

[4] #4 negate v. [neutralize, neutralise, nullify] make ineffective by counterbalancing the effect of; "Her optimism neutralizes his gloom"; "This action will negate the effect of my efforts". wn