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" Let the Argument Reveal Unfamiliar Word Meanings Study the Exact Words Examiners Use Map Each Word Into a Connected Network 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