an arched structure of masonry, forming a ceiling or canopy.-an arched apartment; especially, a subterranean room, use for storing articles, for a prison, for interment, or the like; a cell; a cellar.-the canopy of heaven; the sky.-a leap or bound.-the bound or leap of a horse; a curvet.-a leap by aid of the hands, or of a pole, springboard, or the like.-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.-to leap over; esp., to leap over by aid of the hands or a pole; as, to vault a fence.-to leap; to bound; to jump; to spring.-to exhibit feats of tumbling or leaping; to tumble.