valve Meaning in the Cambridge English Dictionary
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Meaning of “valve” in the English Dictionary

"valve" in British English

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valvenoun [C]

uk   us   /vælv/
a ​device that ​opens and ​closes to ​control the ​flow of ​liquids or ​gases, or a ​similarstructure in the ​heart and the veins that ​controls the ​flow of ​blood: The valve ​failed to open/​close. It was a ​weak heart valve that ​caused her ​death. part of a ​musicalinstrument such as a trumpet that ​changes the ​sound by ​controlling the ​flow of ​air
(Definition of valve from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"valve" in American English

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valvenoun [C]

 us   /vælv/
a ​device that ​controls the ​flow of ​air or ​liquid from one ​place to another: a ​heart valve The ​explosionapparently was caused by a ​faultygas valve.
(Definition of valve from the Cambridge Academic Content Dictionary © Cambridge University Press)
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