SAT antonym Definition A word having a meaning opposite that of another word. Example "The word 'fast' is an antonym of 'slow'." Sign in to save SAT PDF — $25 ← antler anvil → Study tips featuring "antonym" How Context Clues Save You on the SAT Related words SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal SAT abominable