A box or slot into which a courier or postal worker puts letters for a recipient to collect.
A box in which post can be left by a sender to be picked up by a courier or postman (postal worker).
An approximately cylindrical container, usually with a crimped end and a screw top, used to contain and dispense semiliquid substances.
Anything that is hollow and cylindrical in shape.
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.)
A television. Compare cathode ray tube and picture tube.
A tin can containing beer.
An idiot.
A wave which pitches forward when breaking, creating a hollow space inside.
To supply with, or enclose in, a tube.
To intubate.
To ride an inner tube.