Meaning & use
valve
A device that controls the flow of liquid, gas, or air through a pipe or opening.
See it in a sentence
The plumber replaced a broken valve that was leaking water under the sink.
A valve in the heart keeps blood flowing in one direction only.
A note on using this word
Valve appears often in both mechanical contexts, such as engines and pipes, and in biology, as with heart valves.
Words with a similar meaning
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