fireman Syllabification: (fire·man)Pronunciation: /ˈfīrmən/Translate fireman | into French | into German | into Italian | into Spanish Definition of fireman noun (plural firemen /-mən/) 1a firefighter. 2a person who tends a furnace or the fire of a steam engine or steamship; a stoker. an enlisted person in the US navy who maintains and operates a ship’s machinery. fireman in other Oxford dictionaries Definition of fireman in the British & World English dictionary