noun Date: 1883 lineman 1, an official who assists a referee (as in football or hockey) especially in determining if a ball, puck, or player is out-of-bounds or offside
LINESMAN
Meaning of LINESMAN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012