lump - definition and synonyms

noun [countable] 

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  1. 1
    a solid piece of something that does not have a regular shape
    lump of:

    a lump of metal/coal/concrete

    a lump of cheese/butter/meat

     Synonyms and related words
    1. b.
      a solid piece in a substance that should be smooth or liquid

      Stir the sauce to get rid of any lumps.

  2. 2
    a small hard part on or under your skin that is caused by illness or injury
    lump in:

    Doctors found a lump in her breast.

    lump on:

    There was a lump on my head where the ball hit me.