This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Football An official who marks the downs and the position of the ball and watches for certain violations from the sidelines.

n. Sports An official in various court games whose chief duty is to call shots that fall out of bounds.

n. Sports An official in soccer and other field games who indicates when the ball has gone out of bounds.

n. Sports Either of two officials in ice hockey who call icing and offsides, conduct face-offs, and call penalities.

n. See lineman.

n. An assistant referee.

n. An official who calls shots that pitch out of bounds, and judges foot faults.

n. An official whose primary task is to watch the blue line and determine when there has been an offside.

n. An official whose primary task is to determine whether there has been a line of scrimmage violation.

n. A person employed to work on electrical lines; a lineman.

n. the official (in tennis or soccer) who watches the lines.

n. a person who installs or repairs electrical or telephone lines.

n. Milit., a private in the line; an infantryman.

n. In Amer. foot-ball, one of the forwards; also, the man who has charge of the measurements of the distance gained and assists the umpire in various ways.

n. A workman engaged in the erection or maintenance of the line-wires of a telegraphic or telephonic system, or of electric circuits of any sort.

n. official (in tennis, soccer, football, etc.) who assists the referee in some way (especially by watching for out of bounds or offside)

n. a person who installs or repairs electrical or telephone lines

"Finally, if defending players are slow getting to an on-side position for the ensuing faceoff, the linesman is unable to drop the puck (they have five seconds to do so once they blow their whistle, provided everyone is set and ready to go)."

official   

lineman   

electrician    lineman    electrician    lineman   

scorekeeper    timekeeper    reconciler    depositary    bloggers'    redcoats    lineman    intercessor    60th    scoreboard