singular - noun

the form of a word that is used to denote a singleton

singular - adjective

• composed of one member, set, or kind
• grammatical number category referring to a single item or unit
• unusual or striking
• beyond or deviating from the usual or expected
• being a single and separate person or thing
• the single one of its kind

singular - thesaurus

curious   funny   odd   peculiar   queer   remarkable   rum   rummy   unique