wall
noun
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”
anything that suggests a wall in structure or function or effect
“a wall of water”
“a wall of smoke”
(anatomy) a layer (a lining or membrane) that encloses a structure
“stomach walls”
Synonymspariesa difficult or awkward situation
“his back was to the wall”
“competition was pushing them to the wall”
a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
a layer of material that encloses space
“the walls of the cylinder were perforated”
“the container's walls were blue”
a masonry fence (as around an estate or garden)
“the wall followed the road”
“he ducked behind the garden wall and waited”
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”
verb
surround with a wall in order to fortify
Source: WordNet 3.1, Princeton University