a small tower on top of a wall or building, especially a castle (尤指城堡的)塔楼,角楼 Topics Buildingsc2a small metal tower on a ship, plane or tank that can usually turn around and from which guns are fired (战舰、飞机或坦克的)炮塔,回转炮塔,活动射击装置 a gun turret 炮塔
Word OriginMiddle English: from Old French tourete, diminutive of tour ‘tower’.