1. (noun) tube, tubing
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
Synonyms: subway system, tube, electron tube, underground, subway, thermionic vacuum tube, pipe, tubing, vacuum tube, tube-shaped structure, metro, thermionic tube, thermionic valve
2. (noun) tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
Synonyms: subway system, tube, electron tube, underground, subway, thermionic vacuum tube, pipe, tubing, vacuum tube, tube-shaped structure, metro, thermionic tube, thermionic valve
3. (noun) pipe, tube
a hollow cylindrical shape
Synonyms: underground, pipework, subway, organ pipe, tube-shaped structure, thermionic valve, tube, pipe, thermionic vacuum tube, piping, subway system, thermionic tube, vacuum tube, tubing, metro, tobacco pipe, pipage, electron tube
4. (noun) tube, tube-shaped structure
(anatomy) any hollow cylindrical body structure
Synonyms: subway system, tube, electron tube, underground, subway, thermionic vacuum tube, pipe, tubing, vacuum tube, tube-shaped structure, metro, thermionic tube, thermionic valve
5. (verb) metro, tube, underground, subway system, subway
an electric railway operating below the surface of the ground (usually in a city)
Synonyms: resistance, metro, electron tube, underground, subway, thermionic vacuum tube, pipe, tubing, vacuum tube, tube-shaped structure, thermionic valve, underpass, subway system, thermionic tube, tube
6. (verb) tube
provide with a tube or insert a tube into
7. (verb) tube
convey in a tube
8. (verb) tube
ride or float on an inflated tube
9. (verb) tube
place or enclose in a tube
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Synonyms and Antonyms of tube 
