tube

/tju:b/
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tube

A family rides the Tube to visit a museum.

Definition

  1. Noun:

    • A hollow, typically cylindrical, conduit: A long, hollow object, usually round in cross-section, used to hold, convey, or conduct liquids, gases, or other substances.
    • A cylindrical container: A flexible, cylindrical container, often made of metal or plastic, with a cap, used for holding a soft, viscous substance (e.g., toothpaste, paint).
    • An electronic device: (Also called a vacuum tube or thermionic valve) An electronic component consisting of a sealed glass or metal envelope containing electrodes, historically used in electronics for amplification, rectification, and switching.
    • A subway system: (Capitalized as the Tube) The underground railway system in London.
    • (Anatomy/Biology) A hollow cylindrical structure: Any tubular anatomical structure or part, such as a blood vessel or a fallopian tube.
    • A television set: (Informal, dated) A television receiver.

  2. Verb:

    • To convey or enclose in a tube: To place something inside a tube for protection or transport.
    • To ride on an inflated tube: To float, especially for recreation, on a large inflatable rubber tube (e.g., on water or snow).
    • To fit or provide with a tube: To equip something with a tube or tubular lining.
Usage Examples

  • Noun:

    • Water flows through the irrigation tube.
    • She squeezed the last bit of paint from the tube.
    • Old radios were built with vacuum tubes.
    • We took the Tube to get across London quickly.
    • The doctor examined the patient's bronchial tubes.

  • Verb:

    • The factory tubes the glue before shipping.
    • In the summer, we love to tube down the river.
    • The mechanic tubed the new tire.
Advanced Usage
  • "To go down the tubes" (idiom, informal): To fail, deteriorate, or be ruined.
    • After the scandal, his reputation went down the tubes.
  • "Tube it" (verb phrase, informal): To travel by the London Underground.
    • It's faster to tube it than to drive during rush hour.
Variants and Related Words
  • Tubing (n): Material in the form of a tube; the activity of riding on an inflatable tube.
    • Plastic tubing is used in laboratories.
    • We went tubing on the lake.
  • Tubular (adj): Having the shape or form of a tube; (slang) excellent, cool.
    • The plant has a tubular stem.
    • That surfboard is totally tubular!
  • Tubeless (adj): (Of a tire) not requiring an inner tube.
Synonyms
  • Noun (conduit): Pipe, cylinder, hose, duct.
  • Noun (container): Canister, container.
  • Noun (subway): Underground, metro, subway.
Related Phrasal Verbs
  • Tube in: To introduce or feed something through a tube.
    • The patient was tubed in for nutrients.
Related Idioms
  • "Boob tube" (n, informal, dated): A television set.
    • He spent all weekend in front of the boob tube.
tube

A family rides the Tube to visit a museum.

Noun
  1. an electric railway operating below the surface of the ground (usually in a city)
    • in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'
  2. (anatomy) any hollow cylindrical body structure
  3. a hollow cylindrical shape
  4. electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  5. conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
Verb
  1. place or enclose in a tube
  2. ride or float on an inflated tube
    • We tubed down the river on a hot summer day
  3. convey in a tube
    • inside Paris, they used to tube mail
  4. provide with a tube or insert a tube into

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