I. -ˌlīn noun
Date: circa 1862
1. : a line at right angles to a goal line or end line and marking a side of a court or field of play for athletic games
2.
a. : a line of goods sold in addition to one's principal line
b. : a business or activity pursued in addition to one's regular occupation
3.
a. : the space immediately outside the lines along either side of an athletic field or court
b. : a sphere of little or no participation or activity — usually used in plural
II. transitive verb
Date: 1943
: to put out of action : put on the sidelines