Anything that is hollow and cylindrical in shape.
A tube of toothpaste.
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An approximately cylindrical container, usually with a crimped end and a screw top, used to contain and dispense semiliquid substances.
I took the tube to Waterloo and walked the rest of the way.
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(British, colloquial, often capitalised as Tube, a trademark) The London Underground railway system, originally referred to the lower level lines that ran in tubular tunnels as opposed to the higher ones which ran in rectangular section tunnels. (Often the tube.).
He took the tube to Westminster and disappeared.
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