noun.
In fortification, an elevation or mound of earth round a place, capable of resisting cannon-shot, and having the parapet raised upon it; a protecting enceinte; also, this elevation together with the parapet.
noun.
Hence Something that serves as a bulwark or defense; an obstruction against approach or intrusion; a protecting inclosure.
noun.
Synonyms See fortification.
To fortify with ramparts; protect by or as if by a rampart; bolster; strengthen.