lineman

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A person employed to install or repair telephone, telegraph, or electric power lines.
• noun A person employed to inspect and repair railroad tracks.
• noun Football A player positioned on the line of scrimmage near the ball.

from The Century Dictionary.

• noun A person who carries the line in surveying, etc.
• noun One employed in duties relating to the line of a railroad, telegraph, or telephone; one who attends to keeping the parts of the line, as the rails, posts, wires, etc., in proper condition.
• noun A line-fisherman.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who carries the line in surveying, etc.; the surveyor who marks positions with a range pole.
• noun A man employed to examine the rails of a railroad to see if they are in good condition; also, a man employed to install or repair telegraph, telephone, television cable, or power lines. Also called linesman.
• noun (Football) A player whose position is in the first (forward) line, as opposed to a back; one who plays on the line of scrimmage.
• noun colloq. A ladies' man who is especially adept at inventing effective introductory phrases (pick-up lines) to gain a woman's attention.
• noun the position of a player on a football team who is stationed on the line of scrimmage.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a person who installs and repairs overhead cables (either power or telephone); a linesman

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun one of the players on the line of scrimmage
• noun the surveyor who marks positions with a range pole
• noun (American football) the position of a player on a football team who is stationed on the line of scrimmage
• noun a person who installs or repairs electrical or telephone lines