A defensive obstacle made by laying felled trees on top of each other with branches, sometimes sharpened, facing the enemy.
A barricade of felled trees, with branches pointed toward the enemy: now often reinforced with barbed wire.
A means of defense formed by felled trees, or sometimes by bent trees, the ends of whose branches are sharpened and directed outwards, or against the enemy, and more recently fortified with barbed wire. [Mid 19th century.]
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