a long, hollow cylinder of metal, plastic, glass, etc. for holding or transporting something, chiefly liquids or gases

a plastic tube is connected to the tap and the beer is ready to be pulled

a thing in the form of or resembling a tube

the underground railway system in London

a cross-London trek on the Tube

a Tube train

a sealed container, typically of glass and either evacuated or filled with gas, containing two electrodes between which an electric current can be made to flow

fit (a person or animal) with a tube to assist breathing, especially after a laryngotomy

convey in a tube

the wells were flooded, and this water, tubed off, yielded a supply of 38,000 gallons per hour

travel on the underground railway system in London

I tubed to St Pancras

we tubed it back to Queensway

ride on water on a large inflated inner tube

we tubed down creeks, slid down water cascades, and fished in canyons