Pronunciation: (ni-gāt', neg'āt), [key]
—v., -gat•ed, -gat•ing.
1. to deny the existence, evidence, or truth of: an investigation tending to negate any supernatural influences.
2. to nullify or cause to be ineffective: Progress on the study has been negated by the lack of funds.
to be negative; bring or cause negative results: a pessimism that always negates.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.