an official, as in tennis and soccer, who assists the referee.
Football.an official who marks the distances gained and lost in the progress of play and otherwise assists the referee and field judge.
Ice Hockey.either of two officials who assist the referee by watching for icing, offside, and substitution violations and fouls and by conducting face-offs.
lineman (def. 1).
Origin of linesman
First recorded in 1855–60; line1 + 's1 + -man
Words nearby linesman
liner, linerboard, liner note, liner notes, lines, linesman, line space, line spectrum, line squall, line storm, lineswoman