[ sing-guhl-tuhn ]
See synonyms for singleton on
  1. a person or thing occurring singly, especially an individual set apart from others.

    • a child or animal that is the only one born at one birth: a research program involving twins and singletons.

    • an only child in a family.

  1. Chiefly British. an unmarried person; a single.

  2. Cards. a card that is the only one of a suit in a hand.

  3. Mathematics. a set consisting of one given element.

Origin of singleton

First recorded in 1875–80; single + -ton

Words Nearby singleton Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use singleton in a sentence

British Dictionary definitions for singleton


/ (ˈsɪŋɡəltən) /

  1. bridge an original holding of one card only in a suit

  2. a single object, individual, etc, separated or distinguished from a pair or group

  1. maths a set containing only one member

  2. a person who is neither married nor in a relationship

Origin of singleton

C19: from single, on the model of simpleton

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012