(computing) An I/O port, on earlier PCs, used for the attachment of a joystick or similar hardware

plural of game port

(uncountable) A chess opening characterized by the moves 1.e4 e5, in which both White and Black move their king's pawn to the fourth rank with their first move.

A common Open Game in chess, characterized by the moves 1.e4 e5 2.Nf3 Nc6 3.d4, in which white's third move is queen's pawn to the forth rank.

(video games) A video game of a type based around interpersonal combat, often in a tournament setting, in which characters fight until their HP is depleted or the round timer expires.

An arcade game involving skill that rewards the player (in gifts, tokens, etc.) proportionately to his or her score.

(Scotland, Wales, Northern England) The black grouse.

(idiomatic) A stake; something at risk, especially with regard to money and investments.

(video games) The playing of casual games.

(tic-tac-toe) A tie game. Comes from the concept that a cat cannot catch its own tail just like a player in tic-tac-toe cannot win a game that is already tied.