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
These lesions typically resolve within 30 to 60 minutes after water contact.4
How It's Diagnosed
Diagnosing aquagenic urticaria typically requires visiting a dermatologist (a doctor specializing in skin, hair, and nails) or an allergist.
—
Sarah Jividen, Verywell Health, 23 May 2025
The White House physician said at the time that Biden had a small skin lesion with cancerous tissue removed from his chest during his physical exam.
—Ed O'Keefe, CBS News, 19 May 2025
The following year, first lady Jill Biden had two cancerous lesions removed, one above her right eye and the other on her chest.
—Chris Megerian, Chicago Tribune, 19 May 2025
Radiation therapy: Targets metastatic lesions, reducing pain and symptoms, especially in bones.
—Dr. Jamin Brahmbhatt, CNN Money, 19 May 2025
See All Example Sentences for lesion
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Sarah Jividen, Verywell Health, 23 May 2025
The White House physician said at the time that Biden had a small skin lesion with cancerous tissue removed from his chest during his physical exam.
—Ed O'Keefe, CBS News, 19 May 2025
The following year, first lady Jill Biden had two cancerous lesions removed, one above her right eye and the other on her chest.
—Chris Megerian, Chicago Tribune, 19 May 2025
Radiation therapy: Targets metastatic lesions, reducing pain and symptoms, especially in bones.
—Dr. Jamin Brahmbhatt, CNN Money, 19 May 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 6 Jun. 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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