1. Often Battlements. a parapet or cresting, originally defensive but later usually decorative, consisting of a regular alternation of merlons and crenels; crenelation.

2. Often Battlements. a parapet or cresting, originally defensive but later usually decorative, consisting of a regular alternation of merlons and crenels; crenelation.

3. Noun Often Battlements. a parapet or cresting, originally defensive but later usually decorative, consisting of a regular alternation of merlons and crenels; crenelation.