offside noun definition in Soccer topic from the Oxford Advanced Learner's Dictionary

offside

 noun: Soccer topic
BrE /ˌɒfˈsaɪd/ ; NAmE /ˌɔːfˈsaɪd/ , /ˌɑːfˈsaɪd/ (also US English offsides) the fact of being offside in a game such as football (soccer ) or hockey The goal was disallowed for offside.