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" Map Each Word Into a Connected Network Map the Author's Attitude Before Reading Questions Audit Your Own Writing for Lexical Resource 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