What does tube mean?
A tube is a long, hollow cylinder used to carry liquids, gases, electrical components, or other materials. In everyday use, the word commonly describes pipes, hoses, and the inner rubber chambers of tyres, but its meanings extend to natural structures, such as plant stems and anatomical passages, and to specialised objects such as electronic vacuum tubes. “The tube” can also mean television, particularly in informal North American English, while in British English it is famously associated with the London Underground. As a verb, “to tube” can mean to put something into a tube or to travel through a tubular passage. The word is useful because it connects a precise physical object, an elongated cylindrical shape, and several familiar cultural and technological senses without losing its basic association with hollow, enclosed passageways.
A long, hollow cylinder used to carry liquids, gases, or other materials; also, an elongated passage or structure, an electronic device, a television set informally, or a passageway in a transport system.
"A rubber tube runs from the pump to the bicycle wheel."
The word is highly versatile. “The tube” is an informal term for television and a common name for the London Underground.
To put or fit something into a tube, or to travel through a tubular passage.
"The technician tubed the sample before sending it to the laboratory."
The verb is comparatively uncommon in modern general use and is more likely to appear in technical, scientific, or descriptive contexts.
The plural is used for individual cylindrical objects or separate passages, as in “a set of plastic tubes.”
"The engineer inspected the tubes for signs of corrosion."
The London Underground became known as “the Tube,” turning an ordinary piece of plumbing into the nickname for one of the world's most famous rapid-transit systems.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does tube come from?
The English word entered Middle English from French tube, which was borrowed from Latin tubus, meaning a pipe or tube. Latin tubus became the source of related English forms such as tubular, tubule, and tubiform, which retain the idea of a hollow or cylindrical structure. The modern range of meanings developed gradually as the word was applied to pipes, body structures, electronic devices, and transport tunnels.
Related word forms
How tube is actually used
The pronunciation differs noticeably between British English, with an initial /tj/ sound, and American English, where it is generally /tuːb/. “The tube” is informal for television, especially in North American usage, and is also the familiar British name for the London Underground. The verb is less common than the noun and is usually transitive or followed by a preposition indicating movement through a passage.
Easily confused with tube
A tube is typically a long, narrow cylinder, whereas a tub is a broader, open container used for holding or washing things.