Insolation

//ˌɪnsoʊˈleɪʃən// noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    The incident radiant energy emitted by the sun which reaches a unit area over a period of time, typically measured over a horizontal area at the Earth's surface or at the top of Earth's atmosphere. uncountable, usually

    "The difference in insolation between north-facing and south-facing slopes can affect microclimates as much as hundreds of miles of north-south distance on level ground."

  2. 2
    therapeutic exposure to sunlight wordnet
  3. 3
    The rate of delivery of such radiation. uncountable, usually
  4. 4
    incident solar radiation wordnet
  5. 5
    The act or process of exposing to the rays of the sun, such as for the purpose of medical treatment, drying or maturing, as fruits, drugs, etc., or of rendering acid, as vinegar. uncountable, usually
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  1. 6
    sudden prostration due to exposure to the sun or excessive heat wordnet
  2. 7
    sunstroke. dated, uncountable, usually

Synonyms

All synonyms
sunstrokeair-dryinganhydrationcalefactioncalenturecooking

Example

More examples

"In order to prevent rickets the doctor prescribed insolation."

Etymology

Borrowed from French insolation, from Latin insolatio (“a setting or placing in the sun”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.