tube

noun \ ˈtüb , 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 b
d :the basically cylindrical section between the mouthpiece and bell that is the fundamental part of a wind instrument
2 a :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
4 a :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

tubed

play \ˈtübd, ˈtyübd\ adjective

tubelike

play \ˈtüb-ˌlīk, ˈtyüb-\ adjective
down the tube or down the tubes
:into a state of collapse or deterioration

Examples of tube in a Sentence

  1. She was breathing oxygen through a tube.

  2. watched the liquid move through the tube between the flasks and recorded the movement in his chemistry notebook

Recent Examples of tube from the Web

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.

Origin and Etymology of tube

French, from Latin tubus; akin to Latin tuba trumpet


TUBE Defined for English Language Learners

tube

noun

Definition of tube for English Language Learners

  • : 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


TUBE Defined for Kids

tube

noun \ ˈtüb , ˈtyüb \

Definition of tube for Students

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
6 :television 2

tubelike

\ˈtüb-ˌlīk, ˈtyüb-\ adjective

Medical Dictionary

1

tube

noun \ ˈt(y)üb \

medical Definition of tube

1 :a slender channel within a plant or animal body :duct — see bronchial tube, eustachian tube, fallopian tube
2 a :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

2

tube

transitive verb

medical Definition of tube

tubed; tubing
:to furnish with, enclose in, or pass through a tube
  • the patient is then anesthetized…and tubed
  • Anesthesia Digest


Seen and Heard

What made you want to look up tube? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to conform or adhere

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!