Offside
WordNet
adjective
(1) Illegally beyond a prescribed line or area or ahead of the ball or puck
"The touchdown was nullified because the left tackle was offside"
adverb
(2) Illegally in advance of the ball or puck
noun
(3) (sport) the mistake of occupying an illegal position on the playing field (in football, soccer, ice hockey, field hockey, etc.)
WiktionaryText
Adjective
- In an illegal position ahead of the ball
- To the side of the road, past the curb and sidewalk, e.g. an offside diner (restaurant.)
- Unfavourably located, from the point of view of the player taking a finesse.
Usage notes
- Precise usage varies between sports; singular offside is used more in football, while the plural form offsides is used in american football.