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
Examples of lesion in a Sentence
Recent Examples on the Web
Within his first year at the front, Malaparte was exposed to mustard gas, leaving a pulmonary lesion that, nearly forty years later, contributed to his death.
—
Thomas Meaney, New Yorker, 2 July 2025
Gross necropsy showed lesions in Kota's brain which indicated diffuse encephalopathy, or widespread dysfunction of the brain and brain hemorrhaging, the zoo said.
—Harley Walls, Arkansas Online, 28 June 2025
My appendix was removed, along with another 14 lesions (after having 37 endometriosis lesions and a cyst removed two years ago).
—Vanessa Etienne, People.com, 28 May 2025
But about five months before his visit to the emergency department, one of the lesions on his left ankle had progressed to an ulcer.
—ArsTechnica, 3 July 2025
See All Example Sentences for lesion
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Thomas Meaney, New Yorker, 2 July 2025
Gross necropsy showed lesions in Kota's brain which indicated diffuse encephalopathy, or widespread dysfunction of the brain and brain hemorrhaging, the zoo said.
—Harley Walls, Arkansas Online, 28 June 2025
My appendix was removed, along with another 14 lesions (after having 37 endometriosis lesions and a cyst removed two years ago).
—Vanessa Etienne, People.com, 28 May 2025
But about five months before his visit to the emergency department, one of the lesions on his left ankle had progressed to an ulcer.
—ArsTechnica, 3 July 2025
See All Example Sentences for lesion
Cite this Entry
“Lesion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lesion. Accessed 24 Jul. 2025.
Copy CitationKids Definition
lesion
noun
le·sion
ˈlē-zhən 
: a change in the structure of a bodily organ or part due to injury or disease
especially
: an injured or diseased spot or area clearly marked off from healthy tissue around it
Medical Definition
Legal Definition
lesion
noun
le·sion
ˈlē-zhən
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 enrichmentEtymology
Anglo-French, damage, injury, from Latin laesio, from laedere to injure
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