SAT TOEFL IELTS unique Definition One of a kind; unlike anything else. Example "Each snowflake has a unique pattern." Sign in to save SAT PDF — $25 TOEFL PDF — $25 IELTS PDF — $25 ← uninhabited uniqueness → Study tips featuring "unique" 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