tube - definition and synonyms

 
 
noun 

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/tjuːb/
singulartube
pluraltubes
  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.

    1. a.
  2. 3

    the tube

    or

    the Tube

    British informal the system of underground trains in London
    on the tube:

    Guess who I saw on the tube tonight?

    by tube:

    She goes to work by tube.

    1. a.
      an underground train in London

      What time’s the last tube?

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

    fallopian tubes