The Collaborative International Dictionary
Vaultage
Vaultage \Vault"age\, n.
Vaulted work; also, a vaulted place; an arched cellar. [Obs.]
--Shak.
Wiktionary
vaultage
n. 1 (context obsolete English) Vaulted work. 2 (context obsolete English) A vaulted place or arched cellar.