SAT GRE TOEFL IELTS extinct Definition No longer in existence, especially of a species that has died out. Example "The dodo bird is now extinct." Sign in to save SAT Quiz → GRE Quiz → TOEFL Quiz → IELTS Quiz → ← external extinction → Study tips featuring "extinct" Let the Argument Reveal Unfamiliar Word Meanings Study the Exact Words Examiners Use Group Words Together by Emotional Tone Related words SAT antonym SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal