wall in WordNet English dictionary

1. 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"
   rampart  bulwark  wall 
   
2. (anatomy) a layer (a lining or membrane) that encloses a structure
   "stomach walls"
   wall  paries 
   
3. 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"
   wall 
   
4. a masonry fence (as around an estate or garden)
   "the wall followed the road"; "he ducked behind the garden wall and waited"
   wall 
   
5. a layer of material that encloses space
   "the walls of the cylinder were perforated"; "the container's walls were blue"
   wall 
   
6. 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"
   wall 
   
7. a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
   wall 
   
8. a difficult or awkward situation
   "his back was to the wall"; "competition was pushing them to the wall"
   wall 
   

1. surround with a wall in order to fortify
   wall  palisade  fence  fence in  surround