lesion

noun
le·​sion | \ ˈlē-zhən How to pronounce lesion (audio) \

Definition of lesion

1 : injury, harm
2 : an abnormal change in structure of an organ or part due to injury or disease especially : one that is circumscribed (see circumscribe sense 1) and well defined

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Other Words from lesion

lesioned \ ˈlē-​zhənd How to pronounce lesion (audio) \ adjective

Examples of lesion in a Sentence

Recent Examples on the Web That precision helps keep the patient safe and reduces the chances a surgeon might miss a small and hard-to-reach tumor or lesion that’s deep in the brain. Evan Macdonald, cleveland, 19 Mar. 2021 The surgeon had made sketches during the operation, and brain-imaging studies in the 1990s confirmed that the lesion corresponded to the sketches, although was slightly smaller. Alison Abbott, Scientific American, 30 Jan. 2014 Having a suspicious mole or skin lesion observed by a dermatologist can be a scary thought. Noma Nazish, Forbes, 25 Feb. 2021 An osteochondral lesion is a break in the cartilage that spreads itself over a bone. Devin, Longreads, 2 Feb. 2021 My osteochondral lesion is a repetitive stress injury. Devin, Longreads, 2 Feb. 2021 Bernstein asked, pointing to a red lesion on the side of the patient’s thumb. New York Times, 16 Dec. 2020 The culprit was the old lesion in his T5 vertebra that had been radiated three years earlier. Sarah Elizabeth Richards, Wired, 19 Nov. 2020 Shortly after Schlarman was diagnosed, Kentucky defensive lineman Josh Paschal discovered a lesion on the bottom of his foot that turned out to be malignant melanoma. Jon Hale, The Courier-Journal, 12 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lesion.' 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 lesion

15th century, in the meaning defined at sense 1

History and Etymology for lesion

Middle English, from Anglo-French, from Latin laesion-, laesio, from laedere to injure

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Time Traveler for lesion

Time Traveler

The first known use of lesion was in the 15th century

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Cite this Entry

“Lesion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lesion. Accessed 19 Jun. 2021.

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More Definitions for lesion

lesion

noun

English Language Learners Definition of lesion

medical : an injured or diseased spot or area on or in the body

lesion

noun
le·​sion | \ ˈlē-zhən How to pronounce lesion (audio) \

Kids Definition of lesion

: an abnormal spot or area of the body caused by sickness or injury

lesion

noun
le·​sion | \ ˈlē-zhən How to pronounce lesion (audio) \

Medical Definition of lesion

 (Entry 1 of 2)

: an abnormal change in structure of an organ or part due to injury or disease especially : one that is circumscribed and well defined

Other Words from lesion

lesioned \ -​zhənd How to pronounce lesion (audio) \ adjective

Medical Definition of lesion (Entry 2 of 2)

: to produce lesions in (as an animal's brain)

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lesion

noun
le·​sion | \ ˈlē-zhən How to pronounce lesion (audio) \

Legal Definition of lesion

in the civil law of Louisiana : loss from failure to receive a threshold amount or value (as one-half market value) for immovable property conveyed or transferred by a commutative contract (as a sale or exchange)

called also lesion beyond moiety

— compare unjust enrichment

History and Etymology for lesion

Anglo-French, damage, injury, from Latin laesio, from laedere to injure

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