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Noun: singleton  sing-gul-tun
  1. A single object (as distinguished from a pair)
     
  2. A set containing a single member
     
  3. The playing card that is the only card in a suit held in a bridge hand as initially dealt

Derived forms: singletons

Type of: 1, ace, I, one, playing card, set, single, unity

Encyclopedia: Singleton, New South Wales