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
Green tea consumption and cerebral white matter lesions in community-dwelling older adults without dementia, npj Science of Food, 9(2).
—
Michael Gfoeller and David H. Rundell, Newsweek, 15 Jan. 2025
During a pelvic exam, your provider will try to identify the source of bleeding, such as lesions or tears, or signs of atrophy, such as pale, dry tissue.
—Jess Sims, Health, 26 Dec. 2024
Growers have also battled citrus canker, a disease that creates small lesions on the fruit and results in fruit falling earlier from the tree.
—Steve Wilson | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 20 Dec. 2024
Endo belly, or belly distention, is a term describing moderate to severely painful bloating from endometriosis lesions, comorbid conditions, or surgical complications.
—Michelle Pugle, Verywell Health, 4 Nov. 2024
See all Example Sentences for lesion 
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Michael Gfoeller and David H. Rundell, Newsweek, 15 Jan. 2025
During a pelvic exam, your provider will try to identify the source of bleeding, such as lesions or tears, or signs of atrophy, such as pale, dry tissue.
—Jess Sims, Health, 26 Dec. 2024
Growers have also battled citrus canker, a disease that creates small lesions on the fruit and results in fruit falling earlier from the tree.
—Steve Wilson | The Center Square, Washington Examiner - Political News and Conservative Analysis About Congress, the President, and the Federal Government, 20 Dec. 2024
Endo belly, or belly distention, is a term describing moderate to severely painful bloating from endometriosis lesions, comorbid conditions, or surgical complications.
—Michelle Pugle, Verywell Health, 4 Nov. 2024
See all Example Sentences for lesion
Dictionary Entries Near lesion
Cite this Entry
“Lesion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lesion. Accessed 30 Jan. 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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