1) an underground room for storing coal, wine etc (cellar)

2) an underground room of a church (crypt)

3) an arched roof; series of arches forming a roof; an underground room used for storing things (e.g. a 'wine vault') or for keeping valuables ( a 'bank vault') or for dead bodies (e.g. under a church); to jump in a single movement, with the hand(s) resting on something, or with the help of a pole (vault)