Lesion Definition

lēzhən
lesions
noun
lesions
An injury; hurt; damage.
Webster's New World
An injury or other change in an organ or tissue of the body tending to result in impairment or loss of function.
Webster's New World
Wiktionary

(medicine) An infected or otherwise injured or diseased organ or part, especially such patch of skin.

Wiktionary
verb
To cause a lesion to form on or in.
American Heritage
To cause a lesion to form on or in.
American Heritage Medicine

To wound or injure, especially in an experiment or other controlled procedure.

Wiktionary

Other Word Forms of Lesion

Noun

Singular:
lesion
Plural:
lesions

Origin of Lesion

  • Middle English lesioun from Old French lesion from Latin laesiō laesiōn- from laesus past participle of laedere to injure

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English, from Middle French, from Latin laesiō (“injury"), itself from laesus, perfect passive participle of laedō (“I injure, hurt").

    From Wiktionary

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