\ ˈtüb How to pronounce tube (audio) , ˈtyüb \

Definition of tube

1 : any of various usually cylindrical structures or devices: such as
a : a hollow elongated cylinder especially : one to convey fluids
b : a soft tubular container whose contents (such as toothpaste) can be removed by squeezing
c(1) : tunnel
(2) British : subway sense b
d : the basically cylindrical section between the mouthpiece and bell that is the fundamental part of a wind instrument
2a : a slender channel (such as a fallopian tube or a pollen tube) within a plant or animal body : duct
b : the narrow basal portion of a corolla with united petals or a calyx with united sepals
4a : electron tube especially : vacuum tube
b : cathode-ray tube especially : a television picture tube
5 : an article of clothing shaped like a tube a tube top tube socks
down the tube or down the tubes
: into a state of collapse or deterioration

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Other Words from tube

tubed \ ˈtübd How to pronounce tubed (audio) , ˈtyübd \ adjective
tubelike \ ˈtüb-​ˌlīk How to pronounce tubelike (audio) , ˈtyüb-​ \ adjective

Examples of tube in a Sentence

She was breathing oxygen through a tube. watched the liquid move through the tube between the flasks and recorded the movement in his chemistry notebook
Recent Examples on the Web What led me there was my spitting into a tube, like millions of others have done, and sending off my DNA to be analyzed. Dorothy Pomerantz, STAT, "I was fortunate to get post-23andMe genetic counseling. Everyone should have that option," 7 Feb. 2020 Nasal swabs would be collected from a patient, placed into a tube and mixed with a reactant. Anna Bauman,, "Coronavirus: UCSF expert working on quicker diagnostic test to stop spread," 29 Jan. 2020 Cut a 1 ½ inch long and ¾ inch wide plug from your tree, insert it into a vinyl tube and clamp it into place. Tim Macwelch, Popular Science, "Eight ways an evergreen tree could save your life," 26 Dec. 2019 Cut a 1 ½ inch long and ¾ inch wide plug from your tree, insert it into a vinyl tube and clamp it into place. Tim Macwelch, Outdoor Life, "8 Ways to Use Evergreen Trees in a Survival Situation," 23 Dec. 2019 Dryer lint stuffed into a toilet-paper tube and cotton balls coated with Vaseline both work well. Outside Online, "5 Ways to Impress Your Friends at the Campsite," 25 July 2019 Doctors are inserting chest tubes in Anderson to drain the fluid, which should give more room for lung expansion. Levi Edwards |, al, "Mobile deputy battling life-threatening pneumonia is ‘getting better’," 5 Feb. 2020 Like the serum, the price tag is up there at $145 for a full-sized 50 ml tube. Megan Decker,, "Victoria Beckham Just Launched A Groundbreaking Skin-Care Serum," 5 Feb. 2020 The valley sits on a vast aquifer, water that is likely as ancient as the Pleistocene, that feeds springs connected by volcanic tubes underground. Erin Stone, azcentral, "Concerns grow that Trump's wall will damage rivers, wildlife habitat on Arizona border," 3 Feb. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tube.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tube

1651, in the meaning defined at sense 1

History and Etymology for tube

French, from Latin tubus; akin to Latin tuba trumpet

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Statistics for tube

Last Updated

22 Feb 2020

Cite this Entry

“Tube.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2020.

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How to pronounce tube (audio)

English Language Learners Definition of tube

: a long, hollow object that is used especially to control the flow of a liquid or gas
: an object shaped like a pipe
: a soft, long, narrow container that has a small opening at one end and that contains a soft material which can be pushed out by squeezing


\ ˈtüb How to pronounce tube (audio) , ˈtyüb \

Kids Definition of tube

1 : a long hollow cylinder used especially to carry fluids
2 : a long soft container whose contents (as toothpaste or glue) can be removed by squeezing
3 : a slender channel within a plant or animal body : duct
4 : a hollow cylinder of rubber inside a tire to hold air

Other Words from tube

tubelike \ ˈtüb-​ˌlīk , ˈtyüb-​ \ adjective


\ ˈt(y)üb How to pronounce tube (audio) \

Medical Definition of tube

 (Entry 1 of 2)

1 : a slender channel within a plant or animal body : duct — see bronchial tube, eustachian tube, fallopian tube
2a : an often complex piece of laboratory or technical apparatus usually of glass and commonly serving to isolate or convey a product of reaction a distillation tube
3 : a soft tubular container whose contents (as toothpaste) can be dispensed by squeezing
4 : a hollow cylindrical device (as a cannula) used for insertion into bodily passages or hollow organs for removal or injection of materials
tubed; tubing

Medical Definition of tube (Entry 2 of 2)

: to furnish with, enclose in, or pass through a tube the patient is then anesthetized…and tubedAnesthesia Digest

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More from Merriam-Webster on tube

Thesaurus: All synonyms and antonyms for tube

Rhyming Dictionary: Words that rhyme with tube

Spanish Central: Translation of tube

Nglish: Translation of tube for Spanish Speakers

Britannica English: Translation of tube for Arabic Speakers Encyclopedia article about tube

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