A line of stout posts or timbers set firmly in the earth in contact with each other (and usually with loopholes) to form a barrier, or defensive fortification.
- A defensive barrier made of strong posts or timbers driven upright side by side into the ground.
- A similar fenced or enclosed area, especially one used for protection.
- A jail on a military base.
- To fortify, protect, or surround with a stockade.