ManofwarMan`*of*war"\, n; pl. 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 (Zo["o]l.), The frigate bird; also applied to the skua gulls, and to the wandering albatross. Man-of-war hawk (Zo["o]l.), the frigate bird. Man-of-war's man, a sailor serving in a ship of war. Portuguese man-of-war (Zo["o]l.), any species of the genus Physalia. See Physalia.