Man-of-war

Man′–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(Zoöl.), The frigate bird; also applied to the skua gulls, and to the wandering albatross. — Man-of-war hawk(Zoöl.), the frigate bird. — Man-of-war's man, a sailor serving in a ship of war. — Portuguese man-of-war(Zoöl.), any species of the genus Physalia. See Physalia.