Cover

a term in war to expre security or protection: thus, to land under cover of the guns, is to advance offensively against an enemy who dares not approach on account of the fire from ships, boats or batteries. It likewise signifies whatever renders any movement imperceptible: as, under cover of the night, under cover of a wood, . The gallery or corridor in fortification is however, particularly distinguished by the term Chemin Couvert, covert way, because the glacis of the parade is its parapet.