noun

1. A thing without a like; something unequalled or unparallelled.

adjective

1. Being the only one of its kind; unequaled, unparalleled or unmatched.

   “Every person has a unique life, therefore every person has a unique journey. ― Gary Cook”

2. Of a feature, such that only one holder has it.

3. Particular, characteristic.

Synonyms: one of a kind, singular, sui generis