noun

1. (grammar) A form of a word that refers to only one person or thing.

2. That which is not general; a specific determinate instance.

adjective

1. Being only one of a larger population.

   “A singular experiment cannot be regarded as scientific proof of the existence of a phenomenon.”

2. Being the only one of the kind; unique.

   “She has a singular personality.”

3. Distinguished by superiority: peerless, unmatched, eminent, exceptional, extraordinary.

   “a man of singular gravity or attainments”

Synonyms: curious, eccentric, funny, odd, peculiar, rum, rummy, strange