1. tube - noun
· conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
2. tube - noun
· electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
3. tube - noun
· a hollow cylindrical shape
4. tube - noun
· (anatomy) any hollow cylindrical body structure
5. tube - noun
· 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'"
6. tube - verb
· provide with a tube or insert a tube into
7. tube - verb
· convey in a tube; "inside Paris, they used to tube mail"
8. tube - verb
· ride or float on an inflated tube; "We tubed down the river on a hot summer day"
9. tube - verb
· place or enclose in a tube
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