Definition of onside adjective from the Oxford Advanced American Dictionary

 

onside

 adjective
adjective
NAmE//ˌɑnˈsaɪd//
 
, NAmE//ˌɔnˈsaɪd//
 
 
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(in football, soccer, hockey, etc.) in a position on the field where you are allowed to play the ball or puck
onsideadverbcompare offside
 
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