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tube Definition
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tube
noun(tube)(anatomy) any hollow cylindrical body structure
Synonyms: tube-shaped structure,
tube
noun(tube)an electric railway operating below the surface of the ground (usually in a city)
Examples:
In Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'.
tube
noun(tube)conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
Synonyms: tubing,
tube
noun(tube)electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
Synonyms: electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, vacuum tube,
tube
verb(tube)convey in a tube
Examples:
Inside Paris, they used to tube mail.
tube
verb(tube)place or enclose in a tube
tube
verb(tube)provide with a tube or insert a tube into
tube
verb(tube)ride or float on an inflated tube
Examples:
We tubed down the river on a hot summer day.