lesion

noun

le·​sion ˈlē-zhən How to pronounce lesion (audio)
1
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
lesioned adjective

Examples of lesion in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
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 

Word History

Etymology

Middle English, from Anglo-French, from Latin laesion-, laesio, from laedere to injure

First Known Use

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of lesion was in the 15th century

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.

Kids Definition

lesion

noun
le·​sion ˈlē-zhən How to pronounce lesion (audio)
: 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

lesion

1 of 2 noun
le·​sion ˈlē-zhən How to pronounce lesion (audio)
: an abnormal change in structure of an organ or part due to injury or disease
especially : one that is circumscribed and well defined
lesioned adjective

lesion

2 of 2 transitive verb
: to produce lesions in (as an animal's brain)

Legal Definition

lesion

noun
le·​sion ˈlē-zhən How to pronounce lesion (audio)
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 enrichment
Etymology

Anglo-French, damage, injury, from Latin laesio, from laedere to injure

Last Updated: - Updated example sentences
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