American Dictionary

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Definition valve in American English

valve noun

[countable] noun
/vælv/
1

the part of a machine or piece of equipment that opens and closes in order to control the flow of air or liquid

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2

the part of an organ or tube in your body that opens and closes to keep liquid flowing in the right direction

Example

heart valves

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3

the part of some musical instruments that opens and closes to change the sound of the note

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Definition valve in American English