refereesassistant
nounUK /ˌrɛfəˈriːz əˈsɪstənt/
US /ˌrɛfəˈriz əˈsɪstənt/
A person who helps the referee make sure everyone follows the rules in a game.
The refereesassistant raised the flag to show the ball went out of play.
OTHER MEANINGS
2. A second official who watches the sidelines and helps the main referee.
The refereesassistant signaled for a throw-in.
3. Someone who supports the person in charge of keeping order during a sport.
As a refereesassistant, she kept an eye on the players near the touchline.
4. A helper who checks whether players are offside during a match.
The refereesassistant called offside just before the goal.