In soccer, the term 'offside' refers to a violation that occurs when an attacking player is closer to the opponent's goal line than both the ball and the second-to-last defender (usually the last outfield player) when the ball is played to them. Being in an offside position does not result in a penalty unless the player receives the ball or interferes with an opponent. The offside rule is designed to promote fair play and prevent "goal-hanging," ensuring that the game remains dynamic and competitive.