A defensive barricade or row of obstructions made up of closely spaced felled trees, their tops toward the enemy, their branches trimmed to points and interlaced where possible.

(also abattis) - an obstacle created by felling trees in the direction of the enemy.

line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) toward the enemy

a barricade or obstacle comprised of felled trees arranged with the branches pointing outwards

an obstacle created by cutting down trees so their tops are criss-crossed and pointing toward the expected enemy direction

The abatis is a defensive feature consisting of felled trees lying parallel to each other with sharpened branches pointing in the direction of the attackers approach.

One of the oldest forms of defense for fortifications, the abatis is an arrangement of felled trees, with the branches facing outward from the defending position to impede the charging enemy.

A roadblock or defensive barrier that was made of felled trees piled on top one another, with the branches sharpened pointing toward the oncoming or expected enemy.

(Ah-ba-tee): A barrier of felled trees with sharpened and entangled branches pointing toward the enemy and lined up in a mass along the glacis. The abatis served to impede the enemy advance upon the fort.

A line of trees, chopped down and placed with their branches facing the enemy, used to strengthen fortifications.

Abatis, abattis, or abbattis (a French word meaning a heap of material thrown) is a term in field fortification for an obstacle formed of the branches of trees laid in a row, with the tops directed towards the enemy. The trees are usually interlaced or tied with wire. Abatis are used alone or in combination with wire entanglements and other obstacles.