1a continuous vertical brick or stone structure that encloses or divides an area of land:a garden wall
an upright side of a building or room:opulent rooms with tapestries on the walls
any high vertical surface, especially one that is imposing in scale:the eastern wall of the valley figurativeflash floods sent a six-foot wall of water through the village
(the Wall)short for Berlin Wall.he was on location in Germany while the Wall was tumbling down
2a thing regarded as a protective or restrictive barrier:police investigating the murders met a wall of silence from witnesses
Soccer a line of defenders forming a barrier against a free kick taken near the penalty area:he curled a free kick around the wall for a late equalizer
3 Anatomy & Zoology the membranous outer layer or lining of an organ or cavity:the wall of the stomach
enclose (an area) within walls, especially for protection or privacy:parts of the city’s East End had been walled off with concrete barricades (as adjective walled)a walled garden
(wall something up) block or seal a place by building a wall around or across it:one doorway has been walled up
(wall someone/thing in/up) confine or imprison someone or something in a restricted or sealed place:the grey tenements walled in the space completely