Definition of vault

• n. - An arched structure of masonry, forming a ceiling or canopy.
• n. - An arched apartment; especially, a subterranean room, use for storing articles, for a prison, for interment, or the like; a cell; a cellar.
• n. - The canopy of heaven; the sky.
• n. - A leap or bound.
• n. - The bound or leap of a horse; a curvet.
• n. - A leap by aid of the hands, or of a pole, springboard, or the like.
• v. t. - To form with a vault, or to cover with a vault; to give the shape of an arch to; to arch; as, vault a roof; to vault a passage to a court.
• v. i. - To leap over; esp., to leap over by aid of the hands or a pole; as, to vault a fence.
• n. - To leap; to bound; to jump; to spring.
• n. - To exhibit feats of tumbling or leaping; to tumble.