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guard

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noun guard pronunciation in British English /ɡɑː(r)d/ 
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singularguard
pluralguards
  1. 1
    [countable] someone whose job is to look after a place or person so that no one causes damage, steals anything, or escapes

    a prison guard

    uniformed border guards

    armed guard:

    There was an armed guard on duty outside his door.

    post a guard:

    The captain posted two guards at the gate.

    1. a.
      [singular] a group of guards who are working together
      change/relieve the guard:

      The guard was due to be relieved at six o'clock.

  2. 2
    [singular] a unit of soldiers or police officers, especially one that has a particular job

    members of the Presidential guard

    troops belonging to the National Guard

    1. a.

      Guards

      [plural] used in the names of some units in an army, especially the British army

      a captain in the Scots Guards

      Synonyms and related words for this sense of guard
    2. b.

      Guard

      [countable] Irish informal an officer in the Irish police force
  3. 3
    [countable] something that helps to stop something bad from happening
    guard against:

    We kept the landmines as a guard against invasion from the North.

  4. 5
    [countable] something that covers a dangerous part of a machine
    Synonyms and related words for this sense of guard
    1. b.
      the way that boxers stand with their hands in front of their face, to protect themselves from an opponent
      put up your guard(s):

      They put their guards up and began circling each other.

      Synonyms and related words for this sense of guard

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