Definition of undercroft
: a subterranean room; especially : a vaulted chamber under a church
Origin and Etymology of undercroft
Middle English, from under + crofte crypt, from Middle Dutch, from Medieval Latin crupta, from Latin crypta — more at crypt
First Known Use: 14th century
Seen and Heard
What made you want to look up undercroft? Please tell us where you read or heard it (including the quote, if possible).