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
One patient might have lesions on the face, likened to wolf bites by the 13th-century physician who gave lupus its name.
—
Sarah Zhang, The Atlantic, 4 Nov. 2024
Part of the problem of atherosclerosis is that dead cells in the vascular tissue aren’t properly cleared away by immune cells, creating lesions in the arteries.
—Michael Irving, New Atlas, 14 Oct. 2024
Sometimes, new lesions can occur several days after the initial exposure to giant hogweed, giving the impression that the rash is spreading.
—Leanne Potts, Better Homes & Gardens, 28 Sep. 2024
Other surgical management: Tinnitus related to noncancerous tumors in the ears and brainstem tumors may be treated by surgically removing related tumors or lesions.
—Carley Millhone, Health, 20 Oct. 2024
See all Example Sentences for lesion 
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Sarah Zhang, The Atlantic, 4 Nov. 2024
Part of the problem of atherosclerosis is that dead cells in the vascular tissue aren’t properly cleared away by immune cells, creating lesions in the arteries.
—Michael Irving, New Atlas, 14 Oct. 2024
Sometimes, new lesions can occur several days after the initial exposure to giant hogweed, giving the impression that the rash is spreading.
—Leanne Potts, Better Homes & Gardens, 28 Sep. 2024
Other surgical management: Tinnitus related to noncancerous tumors in the ears and brainstem tumors may be treated by surgically removing related tumors or lesions.
—Carley Millhone, Health, 20 Oct. 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 22 Nov. 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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