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Sideline   /sˈaɪdlˌaɪn/   Listen
noun
Side line, Sideline  n.  
1.
(a)
A line pertaining or attached to the side of a thing.
(b)
Specif., a line for hobbling an animal by connecting the fore and the hind feet of the same side.
2.
A line of goods sold in addition to one's principal articles of trade; a course of business pursued aside from one's regular occupation.
3.
A secondary road; esp., a byroad at right angles to a main road. (Canada)
4.
(Sports) Either of two marked lines which delimit the side boundaries of a playing field, as in football or soccer.
5.
(Sports) (plural) The areas in a sports arena just beyond the sidelines (4), where coaches and alternative players sit or stand.
on the sidelines not actively involved in an activity, such as a sporting event, but available for use when needed; in reserve; as, the coach kept him on the sidelines for a week.



verb
Sideline  v. t.  To render unable to participate in an activity, such as a sporting event; as, the pitcher was sidelined by a groin injury.






Collaborative International Dictionary of English 0.48








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"Sideline" Quotes from Famous Books



... animals," answered Old Beard. "The terrestrial food plants grown hydroponically and sold in the dome cities actually are a supplemental sideline to the real purpose of this place. Marscorp is conducting its own experiments here, with ...
— Rebels of the Red Planet • Charles Louis Fontenay



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