Definition of tube
- a tube top
- tube socks
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
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.
: 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
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