Bāt'tle-ment, n.

noun

n. [Either from battle, to contend in fight, because the battlement was the wall on which the warriors (O. Fr. batailliers, battailleurs) stood and battled (O. Fr. batailleur), or fr. L. Lat. bastilla, bastillus, tower, fortification, O. Fr. bastille, castle, fortress. See BASTILE. Cf. O. Fr. batailler, batillier, to fortify.] (Arch.) A notched or indented parapet, originally used only on fortifications, but afterward employed on ecclesiastical and other edifices. Oxf. Gloss.

Up to the highest battlement, from whence The Trojans threw their darts.

Denham.

A drawing of a wall with projecting battlements and crenellations. — Battlement.