n. In fortification, a fence or barrier constructed by planting upright in the ground timber, piles, or trunks of trees, so as to inclose an area which is to be defended.n. An inclosure or pen made with posts and stakes.n. In hydraulic engineering, a row of piles serving as a breakwater, or to protect an embankment.To encompass or fortify with posts or piles fixed in the ground.