Noun | 1. | haloperidol - tranquilizer (trade name Haldol) used to treat some psychotic disorders and Tourette's syndrome antipsychotic, antipsychotic agent, antipsychotic drug, major tranquilizer, major tranquilliser, major tranquillizer, neuroleptic, neuroleptic agent, neuroleptic drug - tranquilizer used to treat psychotic conditions when a calming effect is desired |