fireman

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

• noun A firefighter.
• noun A man who tends fires; a stoker.
• noun An enlisted man in the US Navy or Coast Guard engaged in the operation of engineering machinery.
• noun Baseball A relief pitcher.

from The Century Dictionary.

• noun One of an organized company, in a city or town, whose business it is to extinguish or prevent conflagrations; a member of a fire-company.
• noun One of the crew of a gun in the United States navy whose duty it is to assist in extinguishing fire, especially during a battle.
• noun A man employed in tending fires, as of a steam-engine; a stoker.
• noun In coal-mining, a person charged with the special duty of examining every morning the working-places and roads of a pit to ascertain if fire-damp is present.

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

• noun A man whose business is to extinguish fires in towns; a member of a fire company.
• noun A man who tends the fires, as of a steam engine; a stocker.

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

• noun firefighting Someone (implied male) who is skilled in the work of fighting fire.
• noun rail transport A man who keeps the fire going underneath a steam boiler (originally, shoveling coal by hand), particularly on a railroad locomotive.
• noun rail transport By extension of the above, an assistant on any locomotive, whether steam-powered or not.
• noun baseball A relief pitcher.

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

• noun play in which children pretend to put out a fire
• noun a laborer who tends fires (as on a coal-fired train or steamship)
• noun a pitcher who does not start the game
• noun a member of a fire department who tries to extinguish fires