IPA: /ˈsaɪd.laɪn/
KK: /ˈsaɪdˌlaɪn/
A line that marks the side of a sports field or court, or the area outside the playing area where coaches and spectators are located.
The players waited on the sideline for their turn to enter the game.
To remove someone or something from active involvement or participation in an activity or event.
The coach decided to sideline the injured player for the rest of the season.
Past: sidelined
Past Participle: sidelined
Sideline → It is formed from "side" (from Old English "side", meaning the lateral part) and "line" (from Latin "linea", meaning a line or string). The word "sideline" refers to a line that runs along the side, often used in sports to denote the boundary area away from the main action.
Think of a 'line' ('linea') that runs along the 'side' ('side') of a field, which helps you remember that a sideline is the boundary area beside the main action.