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English definition of “gauge”

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gauge

verb [T]  /ɡeɪdʒ/ us  
to calculate an amount by using a measuring device or by your own judgment, or to make a judgment about people’s feelings: It was not easy to gauge his height from this distance, but he seemed pretty tall. [+ question word] It’s difficult to gauge how they’ll react when they hear the news.

gauge

noun [C]  /ɡeɪdʒ/ us  
a device for measuring the amount or size of something: She used a pressure gauge to measure the air pressure in her bicycle tires. The test is simply a gauge of (= a way of judging) how well they will do in college. A gauge is also a measure of the thickness of a wire or of the opening inside the barrel (= long part) of a gun: a 12-gauge shotgun
(Definition of gauge from the Cambridge Academic Content Dictionary © Cambridge University Press)
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