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mass - definition and synonyms


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noun mass pronunciation in British English /mæs/
Word Forms
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  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.


      [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
  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

    1. a.

      the masses

      [plural] ordinary people who are not rich or famous. This word usually shows that you think ordinary people are not important or intelligent

      It is entertainment that will appeal to the masses.

  4. 4




    [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
  5. 5
    [uncountable] chemistry the amount of matter that something contains
    See also critical mass


to fall over forwards so that your face hits the ground or another surface

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the activity of exploring abandoned buildings and other manmade structures

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