- an opening (for a door, window, etc.), esp. one with the sides slanted so that it is wider on the inside than on the outside
- an opening (in a wall or parapet) with the sides slanting outward to increase the angle of fire of a gun
Origin of embrasureFrench from obsolete embraser, to widen an opening, earlier ébraser from uncertain or unknown; perhaps
- An opening in a thick wall for a door or window, especially one with sides angled so that the opening is larger on the inside of the wall than on the outside.
- A flared opening for a gun in a wall or parapet.
Origin of embrasureFrench from embraser to widen an opening
From Middle French embrasure.