line judge
noun/ˈlaɪn dʒʌdʒ/
/ˈlaɪn dʒʌdʒ/
- (in sports such as tennis and American football) an official who helps the umpire or referee, especially in deciding whether or where a ball or player has crossed one of the lines
- The pass was ruled incomplete by the line judge.
Check pronunciation:
line judge