<p><strong>Noun:</strong></p><ul><li>a hollow, usually cylindrical body of metal, glass, rubber, or other material, used especially for conveying or containing liquids or gases</li><li>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</li><li>any hollow, cylindrical vessel or organ: the bronchial tubes</li><li>any hollow, elongated body or part</li><li>the united lower portion of a gamopetalous corolla or a gamosepalous calyx</li><li>electron tube (Electronics)</li><li>television (Informal)</li><li>a television set</li><li>mailing tube</li><li>the tubular tunnel in which an underground railroad runs</li><li>the railroad itself</li><li>the curled hollow formed on the underside of a cresting wave (Surfing Slang)</li><li>subway (British)</li><li>a can of beer (Australian Slang)</li><li>a telescope (Older Slang)</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>to furnish with a tube or tubes</li><li>to convey or enclose in a tube</li><li>to form into the shape of a tube; make tubular</li></ul>