1) Age of Sail naval ship 2) Ship type 
A warship designed and equipped for battle
Man`-of-war' n ; plural Men-of-war . A government vessel employed for the purposes of war, esp. one of large size; a ship of war. Man-of-war bird (Zoology) , The frigate bird; also applied to the skua gulls, and to the wandering albatross. -- Man-of-war hawk
a warship from the age of sail
[n] - a warship intended for combat
ship of the line noun a warship intended for combat
A vessel designed and outfitted for battle.