Definitions of lineman:

• noun:   the position of a player on a football team who is stationed on the line of scrimmage
• noun:   one of the players on the line of scrimmage
• noun:   the surveyor who marks positions with a range pole
• noun:   a person who installs or repairs electrical or telephone lines
• name:  A surname (very rare: popularity rank in the U.S.: #26353)