sideline
A line at the side of something.
Something that is additional or extra or that exists around the edges or margins of a main item.
A line for hobbling an animal by connecting the fore and the hind feet of the same side.
(sports) A line defining the side boundary of a playing field. Used in Canadian football, field lacrosse and basketball.
(sports) The area outside the playing field beyond each sideline.
(figuratively) The outside or perimeter of any activity.
(Canada) A secondary road, especially a byroad at right angles to a main road.
(sports) To bench or to keep someone out of play.
(figurative) To remove or keep out of circulation or out of the focus.