Crenelation

n.

1.

The act of crenelating, or the state of being crenelated; an indentation or an embrasure.

Noun	1.	crenelation - a rampart built around the top of a castle with regular gaps for firing arrows or guns Synonyms: battlement, crenellation
	2.	crenelation - the action of constructing rampparts with gaps for firing guns or arrows Synonyms: crenellation

battlement, bulwark, crenel, crenelate, crenellate, crenellation, crenelle, fort, fortress, merlon, rampart, wall