Did you know?

Click any word in a definition or example to find the entry for that word

tube - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

noun tube pronunciation in British English /tjuːb/
Word Forms
  • Facebook
  • Twitter
  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.

  2. 3

    the tube


    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



used to describe something which is done more carefully and over a longer period of time …

BuzzWord Article

Open Dictionary


the practice of giving birth in the presence of several friends and relatives

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog
Macmillan learn live love play