Definition:
sidelines
- sidelinesThe area immediately outside such lines as a place for nonplayers, substitutes, or spectators
- sidelinesAn activity done in addition to one's main job, esp. to earn extra income
- sidelinesAn auxiliary line of goods or business
- sidelinesSIDELINE, to remove a player from a side
- sidelinesEither of the two lines bounding the longer sides of a football field, basketball court, tennis court, or similar playing area