offside(a = adj.all) offsides - illegally beyond a prescribed line or area or ahead of the ball or puck; "the touchdown was nullified because the left tackle was offside"
Illegally beyond a prescribed line or area or ahead of the ball or puck; -- in sports such as football or hockey; as, the touchdown was nullified because the left tackle was offside. [WordNet 1.5]
offside, adj. & n.
--adj. Sport (of a player in a field game) in a position, usu. ahead of the ball, that is not allowed if it affects play.
--n. (often attrib.) esp. Brit. the right side of a vehicle, animal, etc. (cf. NEARSIDE).