1vault 
/ˈvɑ:lt/ noun
plural vaults /ˈvɑ:lt/ noun [count] 1 : an arched structure that forms a ceiling or roof
▪ They gazed up at the vault of the cathedral. — sometimes used figuratively to refer to the sky ▪ the vault of heaven 2 : a locked room where money or valuable things are kept
▪ a bank vault 3 : a room or chamber in which a dead person is buried
▪ They gazed up at the vault of the cathedral. — sometimes used figuratively to refer to the sky ▪ the vault of heaven
▪ a bank vault
— compare 3vault
