| 1. | a small tower, usually one forming part of a larger structure. |
| 2. | a small tower at an angle of a building, as of a castle or fortress, frequently beginning some distance above the ground. |
| 4. | Military. a domelike, sometimes heavily armored structure, usually revolving horizontally, within which guns are mounted, as on a fortification, ship, or aircraft. |
| 5. | Fortification. a tall structure, usually moved on wheels, formerly employed in breaching or scaling a fortified place, a wall, or the like. |