on·side 
/ˈɑ:nˈsaɪd/ adverb
/ˈɑ:nˈsaɪd/ adverb sports : in a position in which you are allowed to play or receive the ball or puck : not offside
▪ He stepped back onside.
▪ He stepped back onside.
— onside adjective
▪ He was onside. ▪ (American football) an onside kick [=a kick that goes only a short distance so that the team making the kick can try to get the ball instead of having it go to the other team]
▪ He was onside. ▪ (American football) an onside kick [=a kick that goes only a short distance so that the team making the kick can try to get the ball instead of having it go to the other team]
