1. an upright structure of masonry, wood, plaster, or other building material serving to enclose, divide, or protect an area, especially a vertical construction forming an inner partition or exterior siding of a building.
2. A continuous structure of masonry or other material forming a rampart and built for defensive purposes. often used in the plural.
3. A structure of stonework, cement, or other material built to retain a flow of water.
4. something resembling a wall in appearance, function, or construction, as the exterior surface of a body organ or part: the abdominal wall.
5. something resembling a wall in impenetrability or strength: a wall of silence; a wall of fog.
6. an extreme or desperate condition or position, such as defeat or ruin: driven to the wall by poverty.
7. sports the vertical surface of an ocean wave in surfing.
8. to enclose, surround, or fortify with or as if with a wall: wall up an old window. see synonyms at enclose.
9. to divide or separate with or as if with a wall. often used with off: wall off half a room.
10. to confine or seal behind a wall; immure: "I determined to wall [the body] up in the cellar” ( Edgar Allan poe).
11. to block or close (an opening or passage, for example) with or as if with a wall.
12. off the wall slang extremely unconventional.
13. off the wall slang without foundation; ridiculous: an accusation that is really off the wall.
14. up the wall slang into a state of extreme frustration, anger, or distress: tensions that are driving me up the wall.
15. writing an ominous indication of the course of future events: saw the writing on the wall and fled the country.

1. A spring of water.
2. A rampart of earth, stones etc. built up for defensive purposes.
3. A structure built for defense surrounding a city, castle etc.
4. each of the substantial structures acting either as the exterior of or divisions within a structure.
5. A point of desperation.
6. A point of defeat or extinction.
7. an impediment to free movement.
8. A type of butterfly (Lasiommata megera).
9. A barrier.
10. A barrier to vision.
11. something with the apparent solidity and dimensions of a building wall.
12. A divisive or containing structure in an organ or cavity.
13. A fictional bidder used to increase the price at an auction. also called a chandelier.
14. A line of defenders set up between an opposing free-kick taker and the goal.
15. A personal notice board listing messages of interest to a particular user.
16. to enclose with a wall
17. to enclose by surrounding with walls.
18. to separate with a wall
19. to seal with a wall
20. to boil.
21. to well, as water; spring.

1. A kind of knot often used at the end of a rope; a wall knot; a wale.
2. 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. A defense; a rampart; a means of protection; in the plural, fortifications, in general; works for defense.
4. an inclosing part of a receptacle or vessel.
5.
6. the side of a level or drift.
7. the country rock bounding a vein laterally.
8. to inclose with a wall, or as with a wall.
9. to defend by walls, or as if by walls; to fortify.
10. to close or fill with a wall, as a doorway.

1. to inclose with a wall or as with a wall; furnish with walls: as, to wall a city.
2. to defend by walls; fortify.
3. to obstruct or hinder as by a wall.
4. to fill up with a wall.
5. in english university slang, same as gate.
6. to boil.
7. to well, as water; spring.
8. abbreviations of wallachian.
9. A work or structure of stone, brick, or other materials, serving to inclose a space, form a division, support, superincumbent weight, or afford a defense, shelter, or security.
10. A solid and permanent inclosing fence of masonry, as around a field, a garden, a park, or a town.
11. A rampart; a fortified enceinte or barrier: often in the plural. see cuts under chemm-deronde, fortification, and retaining wall.
12. something which resembles or suggests a wall: as, a wall of armed men; a wall of fire.
13. A defense; means of security or protection.
14. in mining, one of the surfaces of rock between which the vein or lode is inclosed; the country, or country rock, adjacent to the vein. see vein.
15. in heraldry, a bearing having some resemblance to a wall, usually embattled.
16. in anatomy and zoology, a paries; an extended investing or containing structure or part of the body: as, a cell-wall; the walls of the chest or abdomen: generally in the plural
17. in cor als, the proper outer investment of the visceral chamber, whether of a single corallum or of a single corallite of a compound corallum.
18. same as wall-knot
19. A spring of water.
20. A disease of the eyes: same as walleye.

1. a difficult or awkward situation
2. an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure
3. a layer of material that encloses space
4. an embankment built around a space for defensive purposes
5. a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
6. anything that suggests a wall in structure or function or effect
7. (anatomy) a layer (a lining or membrane) that encloses a structure
8. surround with a wall in order to fortify
9. a masonry fence (as around an estate or garden)