Pronunciation: (yOO-nēk'), [key]
1. existing as the only one or as the sole example; single; solitary in type or characteristics: a unique copy of an ancient manuscript.
2. having no like or equal; unparalleled; incomparable: Bach was unique in his handling of counterpoint.
3. limited in occurrence to a given class, situation, or area: a species unique to Australia.
4. limited to a single outcome or result; without alternative possibilities: Certain types of problems have unique solutions.
5. not typical; unusual: She has a very unique smile.
the embodiment of unique characteristics; the only specimen of a given kind: The unique is also the improbable.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.