Definitions

1. verb

to shut or enclose (something) within walls, especially for protection or confinement

“The castle was immured from the outside world, with no visible windows or doors.”

2. verb

to enclose or confine (something) in a wall or fortification

“The ancient city was immured by a ring of defensive walls.”

3. noun

something that is shut in or enclosed, especially a part of a building

“The immure of the old church was a mysterious and forgotten place.”