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 only definitive diagnostic method is laparoscopy, during which lesions can be removed and the disease staged based on the depth, location, and type of adhesions. Josh Hammer, Newsweek, 15 Feb. 2025 Additionally, experts noted that when melanoma spreads to the brain, there is often more than one lesion at a time. Vanessa Etienne, People.com, 13 Feb. 2025 Plaque lesions: Larger, flat-topped, raised areas of skin, often with a rough or scaly surface. Christopher Bergland, Verywell Health, 4 Feb. 2025 Available in various towns and cities across the UK, such services use imaging technology to assess each and every mole on your body, ruling out suspicious and potentially cancerous lesions, as well as tracking any changes to your moles over time. Varsha Patel, refinery29.com, 29 Dec. 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 18 Feb. 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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