Longman Dictionary of Contemporary English - vault

~1 n 1 also vaults a room with thick walls and a strong door where money, jewels etc are kept to prevent them from being stolen or damaged 2 also vaults a room where people from the same family are buried, often under the floor of a church 3 a jump over something  (- see also pole vault) 4 a roof or ceiling (1) that consists of several arches that are joined together, especially in a church ~2 also vault over ~ v to jump over something in one movement, using your hands or a pole to help you  (He vaulted over the fence and ran off into the night.) - vaulter n