"offside" in the noun sense
1. offside
sport) the mistake of occupying an illegal position on the playing field (in football, soccer, ice hockey, field hockey, etc.)
"offside" in the adjective sense
1. offside, offsides
illegally beyond a prescribed line or area or ahead of the ball or puck
"the touchdown was nullified because the left tackle was offside"
"offside" in the adverb sense
1. offside
illegally in advance of the ball or puck
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License