<p><strong>Noun</strong></p><ul><li>an arched structure, usually made of stones, concrete, or bricks, forming a ceiling or roof over a hall, room, sewer, or other wholly or partially enclosed construction</li><li>an arched structure resembling a vault</li><li>a space, chamber, or passage enclosed by a vault or vaultlike structure, especially one located underground</li><li>an underground chamber, as a cellar or a division of a cellar</li><li>a room or compartment, often built of or lined with steel, reserved for the storage and safekeeping of valuables, especially such a place in a bank</li><li>a strong metal cabinet, usually fireproof and burglarproof, for the storage and safekeeping of valuables, important papers, etc.</li><li>a burial chamber</li><li>Anatomy: an arched roof of a cavity</li><li>something likened to an arched roof: the vault of heaven</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to construct or cover with a vault</li><li>to make in the form of a vault; arch</li><li>to extend or stretch over in the manner of an arch; overarch: An arbor vaulted the path</li><li>to store in a vault: The paintings will be vaulted when the museum is closed</li><li>(used without object) to curve or bend in the form of a vault</li></ul>