subs. (B. E.).1. A very silly, foolish Fellow.
2. (old).A corkscrew: from the name of a Dublin cutler famous for his tempering (GROSE).
3. (gaming).A single card of any suit in a hand: whist. Also a hand containing such a card.
1885. The Field, 12 Dec. Nor was it to prove that the lead of a SINGLETON was sometimes good play.
1885. R. A. PROCTOR, How to Play Whist, Preface. Outside the modern Signalling system and the absolute rejection of the SINGLETON lead, there is very little difference between the Whist of to-day and the Whist of Hoyle and Matthews.