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noun tube pronunciation in British English /tjuːb/ 
Word Forms
  1. 1
    [countable] a long narrow object similar to a pipe that liquid or gas can move through

    Nurses had to feed Dan through a tube.

    Synonyms and related words for this sense of tube
    Synonyms and related words for this sense of tube
    1. a.
      an object shaped like part of a pipe

      a toilet paper tube

      Synonyms and related words for this sense of tube
  2. 3

    the tube


    the Tube

    British informal the system of underground trains in London

    a tube station/platform/train

    on the tube:

    Guess who I saw on the tube tonight?

    by tube:

    She goes to work by tube.

  3. 4
    [countable] a long thin part inside your body that is shaped like a tube

    fallopian tubes

  4. 6

    the tube

    American informal television



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