<p><strong>Noun</strong></p><ul><li>a line at the side of something.</li><li>a business or activity pursued in addition to one's primary business; a second occupation.</li><li>an additional or auxiliary line of goods: a grocery store with a sideline of household furnishings.</li><li>either of the two lines defining the side boundaries of a field or court.</li><li>the area immediately beyond either sideline, where the substitute players sit.</li><li>the position or point of view taken by a person who observes an activity or situation but does not directly participate in it.</li></ul><p><strong>Verb</strong></p><ul><li>sidelined, sidelining.</li><li>to render incapable of participation, especially in anything involving vigorous, physical action, as a sport: An injury to his throwing arm sidelined the quarterback for two weeks.</li></ul><p><strong>End of Response</strong></p>