a type of arch that supports a roof or ceiling, esp. in a church or public building, or a ceiling or roof supported by several of these arches

a room, esp. in or under the ground floor of a large building, that is used to store things safely:

In a bank, a vault is where money, jewelry, important documents, etc., are locked for protection.

to jump over something:

To vault is also to move someone suddenly to a much higher or more important position:

a room with thick walls and a strong door, which is used to safely store money, valuable things, etc.:

[ T ] to move someone suddenly to a more important position:

[ I ] to move suddenly to a higher level or a more important position: