What does the word ace mean?

Usage examples for ace

  1. Have you ever asked for one card when you wanted to fill a royal flush and happened to pick out the necessary ace? – A Damsel in Distress by Pelham Grenville Wodehouse
  2. The King is the Cornish army, yonder: the Ace is my pistol here, which I hold. – The Splendid Spur by Arthur T. Quiller Couch
  3. " I pay King and Ace only," he called out imperturbably, as he turned up a Queen. – The Nest of the Sparrowhawk by Baroness Orczy