Definition of unique

• (followed by `to) applying exclusively to a given category or condition or locality; "a species unique to Australia"
• the single one of its kind; "a singular example"; "the unique existing example of Donnes handwriting"; "a unique copy of an ancient manuscript"; "certain types of problems have unique solutions"
• highly unusual or rare but not the single instance; "spoke with a unique accent"; "had unique ability in raising funds"; "a frankness unique in literature"; "a unique dining experience"