kelvin

noun
kel·vin | \ˈkel-vən \

Definition of kelvin 

(Entry 1 of 3)

: the base unit of temperature in the International System of Units that is equal to 1/273.16 of the Kelvin scale temperature of the triple point of water

Kelvin

adjective

Definition of Kelvin (Entry 2 of 3)

: relating to, conforming to, or having a thermometric scale on which the unit of measurement equals the Celsius degree and according to which absolute zero is 0 K, the equivalent of −273.15°C

Kelvin

biographical name
Kel·vin | \ˈkel-vən \

Definition of Kelvin (Entry 3 of 3)

1st Baron 1824–1907 William Thomson British mathematician and physicist

Examples of kelvin in a Sentence

Adjective

a temperature of 200 degrees Kelvin

Recent Examples on the Web: Noun

Color temperatures range from about 1,400 to 10,000 kelvin. New York Times, "These Lights Are Like a Mood Ring for Your Room," 8 May 2018 So on the kelvin scale, the processor is 180 times colder than the temperature of space. Scientific American, "Readers Respond to the December 2017 Issue," 1 Dec. 2017 The review concerns a potential redefinition of the ampere (a unit of electricity), the kelvin (temperature), the mole (measurement of atoms and or molecules) and the kilogram. David Grossman, Popular Mechanics, "These Basic Units of Measurement Could Change in 2018," 20 Oct. 2017 Cornell and Wieman were trying to cool a puff of rubidium gas to within a few billionths of a degree of absolute zero—colder than any place in nature, even the 2.73 kelvins of space. Adrian Cho, Science | AAAS, "Coolest science ever headed to the space station," 7 Sep. 2017 It isn’t measured by degrees, but individual kelvins. Bill Andrews, Discover Magazine, "The Names Behind the Units of Measure," 10 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'kelvin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of kelvin

Noun

1968, in the meaning defined above

Adjective

1908, in the meaning defined above

History and Etymology for kelvin

Adjective

William Thomson, Lord Kelvin

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Dictionary Entries near kelvin

Keltic

kelty

Kelvin

kelvin

Kelvin's law

Kelvin balance

Kemalism

Statistics for kelvin

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Time Traveler for kelvin

The first known use of kelvin was in 1908

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More Definitions for kelvin

Kelvin

adjective

English Language Learners Definition of Kelvin

 (Entry 1 of 2)

: relating to or having a scale for measuring temperature on which the boiling point of water is at 373.1 degrees above zero and the freezing point is at 273.15 degrees above zero

Kelvin

adjective

English Language Learners Definition of Kelvin (Entry 2 of 2)

: relating to or having a scale for measuring temperature on which the boiling point of water is at 373.1 degrees above zero and the freezing point is at 273.15 degrees above zero

kelvin

noun
kel·vin | \ˈkel-vən \

Medical Definition of kelvin 

(Entry 1 of 2)

: the base unit of temperature in the International System of Units that is equal to 1/273.16 of the Kelvin scale temperature of the triple point of water and also to the Celsius degree

Kelvin

adjective

Medical Definition of Kelvin (Entry 2 of 2)

: relating to, conforming to, or being the Kelvin scale

More from Merriam-Webster on kelvin

Britannica English: Translation of kelvin for Arabic Speakers

Britannica.com: Encyclopedia article about kelvin

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