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English definition of “valve”

valve

noun [C]     /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.Mechanical engineeringMachinery and machinesHousehold equipment and domestic choresThe circulatory system and blood part of a musical instrument such as a trumpet that changes the sound by controlling the flow of airMachine parts
(Definition of valve noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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