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.
The leaves affected by scorch are usually on the sunny or windy side of the tree, while leaf blotch affects most leaves with tiny black fruiting bodies present on the lesions. Tim Johnson, Chicago Tribune, 3 Nov. 2024 The quality of imaging can make the difference between finding a small lesion early or in its later stages, potentially affecting patient outcomes and disease management. Rick Barrett, Journal Sentinel, 25 Oct. 2024 This first-of-its-kind breast scan rotates around the breast, instead of compressing it, and has the capabilities of capturing the smallest lesions for early and accurate diagnosis. Lauryn Higgins, Flow Space, 22 Oct. 2024 This is helpful in patients with hard to locate seizure origins, and in patients with multiple, extensive lesions where traditional MRI could not provide further localizing clue. Randy Bean, Forbes, 6 Oct. 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 12 Dec. 2024.

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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