DictionaryuniqueOne of a kind
adjective

unique

yoo-NEEK/juˈniːk/

The only one of its kind or strikingly different from others.

The four-leaf clover is unique among the three-leaf plants in the patch.

A single four-leaf clover stands out among ordinary three-leaf clovers, visibly the only one of its kind in the small patch.
Etymology

Latin unicus already meant single or alone of its kind. English extended that strict idea of having no counterpart to the looser meaning of being remarkable or notably unusual.

In context

Kidney Cancer2:38
what types of things are unique to cancer what how does cancer function different from normal cells
New Imaging, Can We Use PET Scans? Michael Harrison, M.D.

More examples

  • Even identical twins have unique fingerprints.
  • This plant is unique to the island.
  • Her unique sense of humor makes routine meetings enjoyable.

Forms

unique

uniquely adverb — In a way unlike any other.

uniqueness noun — The quality of being unlike anything else.

Similar words

distinctive
Emphasizes recognizable features, without necessarily implying something is unmatched.
singular
Often emphasizes something unusual or remarkable rather than strictly unmatched.