sideline

En français : touche, ligne de touche

1. A line at the side of something.
2. Something that is additional or extra or that exists around the edges or margins of a main item. · She started the business as a sideline to her regular work and it ended up becoming the greater source of income.· Soup need not be just a sideline to a meal; if you like, it can be the main course.
3. A line for hobbling an animal by connecting the fore and the hind feet of the same side.
4. A line defining the side boundary of a playing field. Used in Canadian football, field lacrosse and basketball.
5. The area outside the playing field beyond each sideline. · The coach stood on the sidelines and bellowed commands at the team.
6. The outside or perimeter of any activity. (figuratively) · to relegate to the sidelines· She installed the whole fixture while he simply watched from the sidelines.
7. A secondary road, especially a byroad at right angles to a main road.
8. A side hustle.

Pluriel sidelines