in·​so·​la·​tion | \ ˌin-(ˌ)sō-ˈlā-shən How to pronounce insolation (audio) \

Definition of insolation

1 : exposure to the sun's rays
3a : solar radiation that has been received
b : the rate of delivery of direct solar radiation per unit of horizontal surface broadly : that relating to total solar radiation

Examples of insolation in a Sentence

Recent Examples on the Web The same thing happens in summer — there’s a delay between when solar insolation is at its maximum (the summer solstice in June) and when the hottest months are (usually July or August). Brian Resnick, Vox, "The winter solstice is Friday: 8 things to know about the shortest day of the year," 18 Dec. 2018

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

First Known Use of insolation

1617, in the meaning defined at sense 1

History and Etymology for insolation

French or Latin; French, from Latin insolation-, insolatio, from insolare to expose to the sun, from in- + sol sun — more at solar

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Time Traveler for insolation

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The first known use of insolation was in 1617

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Cite this Entry

“Insolation.” Dictionary, Merriam-Webster, Accessed 9 Jul. 2020.

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More Definitions for insolation


in·​so·​la·​tion | \ ˌin(t)-(ˌ)sō-ˈlā-shən, in-ˌsō- How to pronounce insolation (audio) \

Medical Definition of insolation

1 : exposure to the rays of the sun

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