adjective
Etymology: from past participle of vault (II)
1.
a. : built in the form of a vault : arched
a vaulted roof
on its vaulted blue dome are gold stars — American Guide Series: Louisiana
b. : having a form resembling a vault
the spacious vaulted reaches of the sky
2. : covered with a vault
vaulted centrally planned buildings of Christian practice — J.B.Ward-Perkins