1. to remove someone from active participation or prevent them from taking part in something
Usage: past tense of sideline
2. to cause someone to be unable to participate due to injury or illness
Usage: sports context; past tense of sideline

1. prevented from participating or being actively involved

Examples

• The star player was sidelined with a knee injury.
• She felt sidelined during the important meeting.
• The quarterback has been sidelined for three weeks.
• Many workers were sidelined by the new automation.
• He remained sidelined while his colleagues got promotions.
• The injury sidelined her for the entire season.
• The politician was sidelined after the scandal broke.