valve Meaning, definition in Cambridge English Dictionary
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Meaning of "valve" - English Dictionary

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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 similar structure 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 musical instrument such as a trumpet that changes the sound by controlling the flow of air
(Definition of valve from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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