Definition of "negate"

negate

/nɪˈɡeɪt/

verb
third-person singular simple present negates, present participle negating, simple past and past participle negated
1. To deny the existence, evidence, or truth of; to contradict.
2. To nullify or cause to be ineffective.
3. To be negative; bring or cause negative results.
4. (computing) To perform the NOT operation on.