the world > space > relative position > condition of being external > enclosing or enclosure > [adjective] > enclosed > by walls (4)
Furnished with or as with a wall, enclosed with a wall. Of a town, etc.: Surrounded or protected with fortifications. Of a well, cistern, pond…
With adverbs. walled-up, closed or blocked up with masonry. walled-in, enclosed by walls.
Surrounded by or as by a wall.
having or enclosed within four walls.