sideline

US /ˈsaɪd.laɪn/
UK /ˈsaɪd.laɪn/
"sideline" picture
1.

a line at each side of the playing area of a sports field or court

:
The coach stood near the sideline, shouting instructions.
The ball went out of bounds over the sideline.
2.

a position of not being actively involved in something

:
He was forced to the sideline due to injury.
Many investors remained on the sidelines during the market downturn.
1.

to remove someone from active participation or involvement in an activity or event

:
The coach decided to sideline the injured player for the rest of the season.
The new policy might sideline some of the older employees.