Definition from Wiktionary, the free dictionary
battlement (plural battlements)
- In fortification: an indented parapet, formed by a series of rising members called cops or merlons, separated by openings called crenelles or embrasures, the soldier sheltering himself behind the merlon while he fires through the embrasure or through a loophole in the battlement.
- Any high wall for defense.
indented parapet formed by a series of rising members
- battlement in The Century Dictionary, The Century Co., New York, 1911