Definitions:
(especially in soccer, rugby, or hockey) in a position where playing the ball or puck is not allowed, especially (in soccer) in the attacking half ahead of the ball and having fewer than two defenders nearer the goal line at the moment the ball is played

(especially in soccer, rugby, or hockey) occupying or taking place in a position where playing the ball or puck is not allowed, especially (in soccer) in the attacking half ahead of the ball and having fewer than two defenders nearer the goal line at the moment the ball is played

the fact of being offside in soccer and other sports

the side of a vehicle furthest from the kerb (in britain, the right)