Webster’s Revised Unabridged Dictionary · 1913
Embrasure
Em·bra′sure, n. [See Embrace.] An embrace. [Obs.] "Our locked embrasures." Shak.
Em·bra′sure, n. [F., fr. embraser, perh. equiv. to ébraser to widen an opening; of unknown origin.] 1. (Arch.) A splay of a door or window.
Apart, in the twilight gloom of a window's embrasure, Sat the lovers. Longfellow.
2. (Fort.) An aperture with slant sides in a wall or parapet, through which cannon are pointed and discharged; a crenelle. See Illust. of Casemate.