Definition of "turret"
turret
/ˈtʌɹ.ɪt/
noun
plural turrets
(historical, military) A siege tower; 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.