To deny the existence, evidence, or truth of; to contradict.
To perform the NOT operation on.
To be negative; bring or cause negative results.
To nullify or cause to be ineffective.
To use a veto against.
An invocation of that right.
A technique or mechanism for discarding what would otherwise constitute a false positive in a scientific experiment
A political right to disapprove of (and thereby stop) the process of a decision, a law etc.
An authoritative prohibition or negative; a forbidding; an interdiction.