Entry 3 senses · 2 variants Webster, 1913 Embrasure · Em·bra·sure · IPA /ɪmˈbɹeɪʒə(ɹ)/ n. n. 01 n. An embrace. 1. An embrace.[Obs.] 02 n. A splay of a door or window. 1. A splay of a door or window.(Arch.) “Apart, in the twilight gloom of a window's embrasure, Sat the lovers.” — Longfellow. 2. An aperture with slant sides in a wall or parapet, through which cannon are pointed and discharged; a crenelle. See Illust. of Casemate.(Fort.) See: Casemate