1. (n.)wall any of various permanent upright constructions having a length much greater than the thickness and presenting a continuous surface except where pierced by doors, windows, etc.: used for shelter, protection, or privacy.
2. wall an immaterial or intangible barrier, obstruction, etc., suggesting a wall: a wall of prejudice.
3. wall a wall-like enclosing part, thing, mass, etc.: a wall of fire; a wall of troops.
4. wall an embankment to prevent flooding, as a levee or sea wall.
5. wall Usu., walls. a rampart raised for defensive purposes.
6. wall the outermost film or layer of structural material protecting, surrounding, and defining the physical limits of an object: the wall of a blood cell.
7. (adj.)wall of or pertaining to a wall.
8. wall growing against or on a wall: wall plants.
9. wall situated or installed in or on a wall: a wall oven.
10. (v.t.)wall to enclose, border, etc., with or as if with a wall (often fol. by in or off): to wall in the playground.
11. wall to seal or fill (a doorway or other opening) with a wall: to wall an unused entrance.
12. wall to seal or entomb (something or someone) within a wall; immure (usu. fol. by up).
13. wall Informal. to become tense or frantic.
14. wall go to the wall,
15. wall to be defeated; yield.
16. wall to fail in business; be forced into bankruptcy.
17. wall to risk one's own position to defend or protect another.
18. wall hit the wall, to reach a point in a long-distance race when the body's fuels are virtually depleted and willpower becomes crucial to the ability to finish.
19. wall Slang.
20. wall unreasonable; crazy.
21. wall eccentric; bizarre.
22. wall Informal. into a state of frantic frustration.
Etymology: (bef. 900; ME; OE w(e)all (c. OFris, OS wal) < L vallum palisade, der. of vallus stake, post)
Definition of 'wall'
Princeton's WordNet
1. (noun)wall 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. (noun)wall 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. (noun)wall, paries (anatomy) a layer (a lining or membrane) that encloses a structure "stomach walls"
4. (noun)wall a difficult or awkward situation "his back was to the wall"; "competition was pushing them to the wall"
5. (noun)wall a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
6. (noun)wall a layer of material that encloses space "the walls of the cylinder were perforated"; "the container's walls were blue"
7. (noun)wall a masonry fence (as around an estate or garden) "the wall followed the road"; "he ducked behind the garden wall and waited"
8. (verb)rampart, bulwark, wall 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"
9. (verb)wall, palisade, fence, fence in, surround surround with a wall in order to fortify
1. (noun)wall one of the sides of a room or building a house with brick walls; the mirror hanging on the wall
2. wall a structure made of stone, brick, cement, etc. that divides land the wall constructed on the border; a low stone wall in the yard
Definition of 'wall'
Webster Dictionary
1. (noun)wall a kind of knot often used at the end of a rope; a wall knot; a wale
2. (noun)wall a work or structure of stone, brick, or other materials, raised to some height, and intended for defense or security, solid and permanent inclosing fence, as around a field, a park, a town, etc., also, one of the upright inclosing parts of a building or a room
3. (noun)wall a defense; a rampart; a means of protection; in the plural, fortifications, in general; works for defense
4. (noun)wall an inclosing part of a receptacle or vessel; as, the walls of a steam-engine cylinder
5. (noun)wall the side of a level or drift
6. (noun)wall the country rock bounding a vein laterally
7. (verb)wall to inclose with a wall, or as with a wall
8. (verb)wall to defend by walls, or as if by walls; to fortify
9. (verb)wall to close or fill with a wall, as a doorway
Definitions of 'wall'
The New Hacker's Dictionary
1. wall [WPI]
1. An indication of confusion, usually spoken with a quizzical tone:
“Wall??”
2. A request for further explication. Compare
octal forty.
3. [Unix, from ‘write all’] v. To send a message to everyone currently logged
in, esp. with the
wall(8)
utility.
It is said that sense 1 came from the idiom ‘like talking to a
blank wall’. It was originally used in situations where, after you
had carefully answered a question, the questioner stared at you blankly,
clearly having understood nothing that was explained. You would then throw
out a “Hello, wall?” to elicit some sort of response from the
questioner. Later, confused questioners began voicing “Wall?”
themselves.
Sense: something built of stone, brick, plaster, wood etc and used to separate off or enclose something There's a wall at the bottom of the garden: The Great Wall of China; a garden wall.
Definitions of wall 
Afrikaans: muur
Arabic: جِدار، سور
Bulgarian: стена
Brazilian: muro
Czech: zeď
German: die Mauer
Danish: mur; -mur
Greek: τοίχος, τείχος
Spanish: muro, tapia, muralla; par
Estonian: müür
Farsi: تيغه
Finnish: seinä
French: mur(aille)
Hebrew: קִיר
Hindi: दीवार
Croatian: zid
Hungarian: fal
Indonesian: tembok
Icelandic: veggur, (varnar)múr
Italian: muro
Japanese: 塀
Korean: 성벽
Lithuanian: siena, tvora
Latvian: siena; mūris
Malay: tembok, benteng
Dutch: muur
Norwegian: mur, vegg, voll
Polish: mur
Portuguese: muro
Romanian: zid
Russian: стена
Slovak: múr
Slovenian: zid
Serbian: zid
Swedish: mur
Thai: กำแพง; ผนัง; ฉาก; เครื่อง
Turkish: duvar
Taiwanese: 牆
Ukrainian: стіна
Urdu: دیوار
Vietnamese: bức tường
Chinese: 墙
