D defs.my
Entry 1 sense Webster, 1913

Abatis

/(ăb"ȧ*tĭs; French ȧ`bȧ`tē")/ · Ab·a·tis · IPA /ˈæbətəs/
01 n. A means of defense formed by felled trees, the ends of whose branches are sharpened and directed outwards, or against the enemy.
  1. 1.
    A means of defense formed by felled trees, the ends of whose branches are sharpened and directed outwards, or against the enemy.(Fort.)