<p><strong>Adjective</strong></p><ul><li>Sports: illegally beyond a prescribed line or area or in advance of the ball or puck at the beginning of or during play or a play: <em>The touchdown was nullified because the offensive left tackle was offside.</em></li><li>With or in doubtful propriety or taste; risqué: <em>an offside joke.</em></li></ul>