Definitions
1.NounUsed other than figuratively or idiomatically: see brick, wall. A wall made of bricks.
2.NounAn obstacle."The investigators came up against a brick wall in their search for the missing money when they discovered it had been transferred overseas."
3.NounA type of anti-aliasing filter with a steep cutoff.
4.NounSomeone who is silent or unresponsive.
5.VerbTo build a brick wall around.
6.VerbTo filter using a brick wall filter.
7.VerbTo halt or limit abruptly.
8.VerbTo be uncooperative and unresponsive.