• synonyms


[in-soh-ley-shuh n]
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  1. exposure to the sun's rays, especially as a process of treatment.
  2. sunstroke.
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Origin of insolation1

First recorded in 1605–15, insolation is from the Latin word insōlātiōn- (stem of insōlātiō). See insolate, -ion


[in-soh-ley-shuh n]
noun Meteorology.
  1. solar radiation received at the earth's surface.
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Origin of insolation2

in(coming) sol(ar radi)ation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for insolation

Historical Examples

British Dictionary definitions for insolation


  1. the quantity of solar radiation falling upon a body or planet, esp per unit area
  2. exposure to the sun's rays
  3. former name for sunstroke
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

insolation in Science


  1. The solar radiation striking Earth or another planet.
  2. The rate of delivery of solar radiation per unit of horizontal surface.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.