existing as the only one or as the sole example; single; solitary in type or characteristics: a unique copy of an ancient manuscript.
having no like or equal; unparalleled; incomparable: Bach was unique in his handling of counterpoint.
limited in occurrence to a given class, situation, or area: a species unique to Australia.
limited to a single outcome or result; without alternative possibilities: Certain types of problems have unique solutions.
not typical; unusual: She has a very unique smile.