From WordNet (r) 3.0 (2006):
wall
n 1: an architectural partition with a height and length greater
than its thickness; used to divide or enclose an area or to
support another structure; "the south wall had a small
window"; "the walls were covered with pictures"
2: anything that suggests a wall in structure or function or
effect; "a wall of water"; "a wall of smoke"; "a wall of
prejudice"; "negotiations ran into a brick wall"
3: (anatomy) a layer (a lining or membrane) that encloses a
structure; "stomach walls" [syn: wall, paries]
4: a difficult or awkward situation; "his back was to the wall";
"competition was pushing them to the wall"
5: a vertical (or almost vertical) smooth rock face (as of a
cave or mountain)
6: a layer of material that encloses space; "the walls of the
cylinder were perforated"; "the container's walls were blue"
7: a masonry fence (as around an estate or garden); "the wall
followed the road"; "he ducked behind the garden wall and
waited"
8: an embankment built around a space for defensive purposes;
"they stormed the ramparts of the city"; "they blew the
trumpet and the walls came tumbling down" [syn: rampart,
bulwark, wall]
v 1: surround with a wall in order to fortify [syn: wall,
palisade, fence, fence in, surround]