adjective, adverb Sports.
Examples from the Web for onside
His most important contribution was recovering an onside kick while playing with the special team.New York Jets Stun the Haters With 48-28 Win Over Buffalo Bills|Allen Barra|September 10, 2012|DAILY BEAST
The young men he called his boys must have all agreed that it was very hard to hurt yourself demonstrating an onside kick.
The old man was demonstrating an onside kick when he injured his hip.
“Onside kicks,” came suddenly from Sid, who had been somewhat quiet.The Winning Touchdown|Lester Chadwick