a little tower, frequently a merely ornamental structure at one of the angles of a larger structure.-a movable building, of a square form, consisting of ten or even twenty stories and sometimes one hundred and twenty cubits high, usually moved on wheels, and employed in approaching a fortified place, for carrying soldiers, engines, ladders, casting bridges, and other necessaries.-a revolving tower constructed of thick iron plates, within which cannon are mounted. turrets are used on vessels of war and on land.-the elevated central portion of the roof of a passenger car. its sides are pierced for light and ventilation.