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
The rash lesions grow and merge eventually making the skin slough off and vital organs fail.
—
Graham Rayman, New York Daily News, 31 July 2024
In some cases, a biopsy can be used to both diagnose and remove an entire lesion or tumor in an excisional biopsy.
—Anna Giorgi, Verywell Health, 24 July 2024
Cats are notorious for developing resorptive lesions on their teeth that can cause oral discomfort as well as bad breath.
—Dr. Devon B. Smith, Baltimore Sun, 11 July 2024
The lesions are marks of a bone infection, osteomyelitis variolosa, caused by the smallpox virus.
—Sonja Anderson, Smithsonian Magazine, 26 June 2024
See all Example Sentences for lesion 
Graham Rayman, New York Daily News, 31 July 2024
In some cases, a biopsy can be used to both diagnose and remove an entire lesion or tumor in an excisional biopsy.
—Anna Giorgi, Verywell Health, 24 July 2024
Cats are notorious for developing resorptive lesions on their teeth that can cause oral discomfort as well as bad breath.
—Dr. Devon B. Smith, Baltimore Sun, 11 July 2024
The lesions are marks of a bone infection, osteomyelitis variolosa, caused by the smallpox virus.
—Sonja Anderson, Smithsonian Magazine, 26 June 2024
See all Example Sentences for lesion
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'lesion.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near lesion
Cite this Entry
“Lesion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lesion. Accessed 18 Aug. 2024.
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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