onside adjective 5noun 2forms 1 adjective5 •Not in an offside position; in the part of the playing area where one can legally play the ball, puck, etc.The goal was allowed because the attacker was onside. •(slang) Within 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 •In agreement or support; on board.There was a very delicate balancing act the whole time about measures that would keep the Unionists onside without upsetting the Nationalist-Republican community too much. — 2012 •On the side of a vehicle from which the driver, paddler, etc. propels it.The toll plaza will consist of an administration building and 16 onside modern barrier-type toll boths, with provision for four additional toll booths should future traffic demand require them. — 1957 •Favourably located, from the point of view of the player taking a finesse. noun2 •The portion of the playing area where one can legally play the ball, puck, etc. •The side of a vehicle on which the driver primarily propels it.The cross-bow rudder uses the offside blade on the onside of the kayak. — 2017 formsonsides
