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
On Sunday, Bolsonaro also went to the hospital for a series of tests and a medical procedure to remove skin lesions, CNN Brasil reported.
—
Michael Rios, CNN Money, 16 Sep. 2025
Fungal infection, yeast infection, some kind of autoimmune lesion such as pemphigus or lupus, acne, and solar dermatitis are just a few other possibilities that come to mind.
—Dr. John De Jong, Boston Herald, 14 Sep. 2025
Symptoms of the infection include diarrhea, stomach cramps, nausea, vomiting, fever, chills, dangerously low blood pressure and blistering lesions.
—Mollye Barrows, USA Today, 10 Sep. 2025
This characteristic texture helped researchers differentiate the lesions caused by osteomyelitis from those caused by other bone pathologies, like osteosarcoma and bone neoplasia (two forms of bone cancer).
—Mrigakshi Dixit, Interesting Engineering, 8 Sep. 2025
See All Example Sentences for lesion
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Michael Rios, CNN Money, 16 Sep. 2025
Fungal infection, yeast infection, some kind of autoimmune lesion such as pemphigus or lupus, acne, and solar dermatitis are just a few other possibilities that come to mind.
—Dr. John De Jong, Boston Herald, 14 Sep. 2025
Symptoms of the infection include diarrhea, stomach cramps, nausea, vomiting, fever, chills, dangerously low blood pressure and blistering lesions.
—Mollye Barrows, USA Today, 10 Sep. 2025
This characteristic texture helped researchers differentiate the lesions caused by osteomyelitis from those caused by other bone pathologies, like osteosarcoma and bone neoplasia (two forms of bone cancer).
—Mrigakshi Dixit, Interesting Engineering, 8 Sep. 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 17 Sep. 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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