abatis

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ab·a·tis

 (ăb′ə-tē′, -tĭs)
n. pl. ab·a·tis (-tēz′) or ab·a·tis·es (-tĭ-sĭz)
A defensive obstacle made by laying felled trees on top of each other with branches, sometimes sharpened, facing the enemy.

[French, pile of things thrown down, from Old French abateis; akin to abattre, to throw down; see abate.]

abatis

(ˈæbətɪs; ˈæbətiː) or

abattis

n
1. (Fortifications) a rampart of felled trees bound together placed with their branches outwards
2. (Fortifications) a barbed-wire entanglement before a position
[C18: from French, from abattre to fell]

ab•a•tis

(ˈæb əˌti, -tɪs, əˈbæt i, əˈbæt ɪs)

n., pl. ab•a•tis (ˈæb əˌtiz, əˈbæt iz)
ab•a•tis•es (ˈæb əˌtɪs ɪz, əˈbæt ə sɪz)
a defensive obstacle formed from rows of tree branches, with an end of each branch facing outward toward the enemy.
[1760–70; < French; Old French abateis < Vulgar Latin *abatteticius, derivative of Old French abattre (see abate)]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.abatis - a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemyabatis - a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy
line of defence, line of defense - defensive structure consisting of a barrier that can be employed for defense against attack