What is deuce definition?

Deuce is a term used primarily in card games, particularly in the game of tennis. In card games, it refers to the card with the rank of two. In tennis, a deuce occurs when both the serving player and the receiving player have won three points each, resulting in a tie. In this situation, the player who wins the next point will earn an advantage and the opportunity to win the game. If the player with the advantage wins the next point, they win the game. However, if the opposing player wins the point, the game goes back to deuce and continues until one player earns the advantage and wins the game.