1. (n.) A rampart; an earthen wall for fortification and protection; a bastion or outwork.

2. (n.) That which secures against an enemy, or defends from attack; any means of defense or protection.

3. (n.) The sides of a ship above the upper deck.

4. (v. t.) To fortify with, or as with, a rampart or wall; to secure by fortification; to protect.