offside /ɒfˈsaɪd/adjective 5noun 4forms 3 adjective5 •In an illegal position ahead of the ball, puck, etc. •(slang) Out of bounds.[Verse 2:Kano]:On-sight, thought he was onside, innit. Saw them guys, no shots fired innit. If you ain't real then don't ride, innit. That postcode, that's offside, innit. — 2016 •(US) To the side of the road, past the curb and sidewalk. •To the side of a boat, opposite the primary side on which one paddles. •Unfavourably located, from the point of view of the player taking a finesse. noun4 •An offside play. •(UK, Australia) The side of a road vehicle furthest from the kerb: the right side if one drives on the left of the road.My offside wing mirror got snapped off. •The right-hand side of a working animal such as a horse or bullock, especially when in harness. •(UK) The side of a canal opposite the towpath. formsoffsides · more offside · most offside