Vault n. : An arched structure of masonry, forming a ceiling or canopy.

Vault n. : An arched apartment; especially, a subterranean room, use for storing articles, for a prison, for interment, or the like; a cell; a cellar.

Vault n. : The canopy of heaven; the sky.

Vault n. : A leap or bound.

Vault n. : The bound or leap of a horse; a curvet.

Vault n. : A leap by aid of the hands, or of a pole, springboard, or the like.

Vault 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.

Vault v. i. : To leap over; esp., to leap over by aid of the hands or a pole; as, to vault a fence.

Vault n. : To leap; to bound; to jump; to spring.

Vault n. : To exhibit feats of tumbling or leaping; to tumble.

Example:
How do the Vault qualifications work for womens' Olympic gymnastics?

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Defination from the web:
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