Ace

Ace is a term used in multiplayer gaming to refer to a single player that kills all enemy players by himself. It is often used in first-person shooters (FPS) such as Call of Duty and Halo.

An ace means hole in one when golfing. It refers to a shot hit from the tee that makes it into the hole.

Aces are a rare feat in golf considering that tees are usually several hundred yards a way from the hole. Occasionally aces are achieved in major tournament play and contests are even held with grand prizes to see who can record an ace. It's tradition for the person who hit the hole in one to buy a round of drinks for everyone back at the clubhouse.

A baseball term that refers to a team's best starting pitcher.

Each MLB team aims to have an ace that they can go to when they need a good pitching performance. An ace is a starting pitcher who starts the game and is meant to pitch at least 5 innings to help his team win the game. If a pitcher can't finish the game, he is replaced by a relief pitcher. A very good ace is necessary in order to have any success in the postseason.