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Definition of kelvin noun from the Oxford Advanced Learner's Dictionary

kelvin

noun

kelvin pronunciation English

ˈkelvɪn

kelvin pronunciation American

ˈkelvɪn

(abbr. K)plural kelvin or kelvins

a unit for measuring temperature. One kelvin is equal to one degree Celsius, but the Kelvin scale starts at absolute zero and water freezes at 273.15 kelvin.