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Dictionary definition for: Tube

1. (n) conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases

2. (v) provide with a tube or insert a tube into

3. (n) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope

4. (v) convey in a tube; "inside Paris, they used to tube mail"

5. (n) a hollow cylindrical shape

6. (v) ride or float on an inflated tube; "We tubed down the river on a hot summer day"

7. (n) (anatomy) any hollow cylindrical body structure

8. (v) place or enclose in a tube

9. (n) electric underground railway

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