SAT TOEFL IELTS unique Definition One of a kind; unlike anything else. Example "Each snowflake has a unique pattern." Sign in to save SAT Quiz → TOEFL Quiz → IELTS Quiz → ← uninhabited uniqueness → Study tips featuring "unique" Spot the Vocabulary Trap in Every Question Audit Your Own Writing to Find Gaps TOEFL Academic Vocabulary: Study by Topic 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