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Definition of tube noun from the Oxford Advanced American Dictionary

      

    tube

     noun
    noun
    NAmE//tub//
     
     
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    pipe
  1. 1[countable] a long hollow pipe made of metal, plastic, rubber, etc., through which liquids or gases move from one place to another see cathode ray tube, inner tube, test tube
  2. 2[countable] a hollow object in the shape of a pipe or tube a bike's inner tube the cardboard tube from the center of a toilet roll
    3. container
  3. 3[countable] tube (of something) a long narrow container made of soft metal or plastic, with a lid, used for holding thick liquids that can be squeezed out of it a tube of toothpaste
    4. part of body
  4. 4[countable] a part inside the body that is shaped like a tube and through which air, liquid, etc. passes bronchial tubes The esophagus is the tube leading from the throat to the stomach. see fallopian tube
    5. television
  5. 5the tube [singular] (informal) the television
    6. in ear
  6. 6[countable] a small tube placed in a child's ear in order to drain liquid from it
    7. Idioms
    go down the tube/tubes (informal)
     
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    (of a plan, company, situation, etc.) to fail The education system is going down the tubes.
See tube in the Oxford Advanced Learner's Dictionary
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