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Từ điển Oxford Advanced Learner 8th
valve
valve [valve valves] BrE [vælv] NAmE [vælv] noun
1. a device for controlling the flow of a liquid or gas, letting it move in one direction only
2. a structure in the heart or in a ↑vein that lets blood flow in one direction only
3. a device in some ↑brass musical instruments for changing the note
Word Origin:
late Middle English (denoting a leaf of a folding or double door): from Latin valva.
Example Bank:
•The plumber will fit some new safety valves.
•You need special tools to open the valve.
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