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mass

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noun mass pronunciation in British English /mæs/ 
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singularmass
pluralmasses
  1. 1
    [countable] a large quantity or number
    mass of:

    We need to turn this mass of evidence into a coherent argument.

    There's a mass of competing anti-virus programs you can choose from.

    1. a.

      masses

      [plural] informal a lot
      mass of:

      Masses of people attended the meeting.

  2. 2
    [countable] a lump or amount of a substance that does not have a clear or definite shape

    The vegetables had turned into a sticky mass at the bottom of the pan.

    mass of:

    All that was left of the car was a mass of twisted metal.

    a mass of dark cloud

    Synonyms and related words for this sense of mass
  3. 3
    [singular] a large crowd of people
    mass of:

    A mass of people followed the procession.

    a seething mass (=moving in all directions):

    a seething mass of protesters

  4. 4

    mass

    or

    Mass

    [countable/uncountable] the main religious ceremony of the Roman Catholic church

    They go to mass every Sunday.

    1. a.
      [countable] music a piece of music written for some of the prayers in the mass

      Bach's Mass in B Minor

      Synonyms and related words for this sense of mass

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