TURRET

noun see: tower Date: 14th century a little tower, 2. a pivoted and revolvable holder in a machine tool, a device (as on a microscope or a television camera) holding several lenses, 3. a tall building usually moved on wheels and formerly used for carrying soldiers and equipment for breaching or scaling a wall, b. a gunner's fixed or movable enclosure in an airplane, a revolving armored structure on a warship that protects one or more guns mounted within it, a similar upper structure usually for one gun on a tank