unique

1. (not comparable) Being the only one of its kind; unequaled, unparalleled or unmatched.Examples: "Every person has a unique life, therefore every person has a unique journey."; "Perhaps the reader will wonder why we have placed our " beings " on a sphere rather than on another closed surface. But this choice has its justification in the fact that, of all closed surfaces, the sphere is unique in possessing the property that all points on it are equivalent."; "3. Both were written and published with the same unique chorus structure; 4. Both compositions were written and published with the same unique harmonic structure;"Synonyms: one of a kind, sui generis, singularnot-comparable

2. (proscribed) Of a rare quality, unusual.Examples: "And as I look back, it seems to me that we were fairly unique, the sixty of us, in that there wasn’t one good mixer in the bunch."proscribed