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wall

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noun [countable] wall pronunciation in American English /wɔl/ 
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singularwall
pluralwalls
  1. 1
    an upright side of a room inside a building

    On the opposite wall hung a valuable old painting.

    She felt along the wall for the light switch.

    1. a.
      an upright outer surface of a building

      The walls of the factory had been covered with graffiti.

    See also  fly2
  2. 2
    a very tall strong structure that is built to defend a place or to keep people inside a place, for example a prison, castle, or city

    Several men escaped over the prison's perimeter wall yesterday.

    the walls of the city

    1. a.
      an upright structure made of stone or brick that surrounds or divides someone's land or yard

      Over the top of the garden wall, he watched his neighbors.

      Parts of the old brick walls had crumbled to the ground.

  3. 3
    emotions or behavior that prevent people from feeling close to each other

    The years had built a wall between the two families.

    wall of:

    A wall of silence had grown up between them.

  4. 4
    a large number of things that form an upright structure like a wall
    wall of:

    a wall of books/boxes

    1. a.
      a large amount of something that has risen up high and makes it difficult for people to pass through

      A wall of dark water approached their small boat.

      Firefighters battled the walls of flames.

  5. 7
    computing an area of a social networking website where you can write personal messages for a user

    What can I write on my boyfriend's Facebook wall for his 16th birthday?

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