tube

Meanings

Noun

• conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
• electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
• a hollow cylindrical shape
• (anatomy) any hollow cylindrical body structure
• 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'"

Verb

• provide with a tube or insert a tube into
• convey in a tube
  • "inside Paris, they used to tube mail"
• ride or float on an inflated tube
  • "We tubed down the river on a hot summer day"
• place or enclose in a tube

Synonyms

electron tube, metro, pipe, subway, subway system, thermionic tube, thermionic vacuum tube, thermionic valve, tube-shaped structure, tubing, underground, vacuum tube