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 PDF — $25 GRE PDF — $25 TOEFL PDF — $25 IELTS PDF — $25 ← external extinction → Study tips featuring "extinct" TOEFL Academic Vocabulary: Study by Topic How Context Clues Save You on the SAT Boost Your IELTS Writing With Precise Vocabulary 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