Dictionary  tubePronunciation: (tOOb, tyOOb), [key] —n., v., tubed, tub•ing. —n. 1. a hollow, usually cylindrical body of metal, glass, rubber, or other material, used esp. for conveying or containing liquids or gases. 2. a small, collapsible, cylinder of metal or plastic sealed at one end and having a capped opening at the other from which paint, toothpaste, or some other semifluid substance may be squeezed. 3. Anat., Zool.any hollow, cylindrical vessel or organ: the bronchial tubes. 4. Bot. a. any hollow, elongated body or part. b. the united lower portion of a gamopetalous corolla or a gamosepalous calyx. 5. See inner tube. 6. Electronics.See electron tube. 7. Informal. a. television. b. a television set. 8. See mailing tube. 9. the tubular tunnel in which an underground railroad runs. 10. the railroad itself. 11. Surfing Slang.the curled hollow formed on the underside of a cresting wave. 12. Brit.subway (def. 1). 13. Australian Slang.a can of beer. 14. Older Slang.a telescope. 15. down the tube or tubes, Informal.into a ruined, wasted, or abandoned state or condition. —v.t. 1. to furnish with a tube or tubes. 2. to convey or enclose in a tube. 3. to form into the shape of a tube; make tubular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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