lesion

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

Definition of lesion

1 : injury, harm
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

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Other Words from lesion

lesioned \ ˈlē-​zhənd How to pronounce lesioned (audio) \ adjective

Examples of lesion in a Sentence

Recent Examples on the Web

The researchers plan to monitor electrical signals in and around the lesion to learn how visual training and external stimulation could help restore function. Alison Abbott, Science | AAAS, "Italian blindness researchers planning monkey studies threatened after health ministry releases names," 21 Aug. 2019 Those two lesions are beta-amyloid plaques and neurofibrillary tangles. Scientific American, "Blood Tests for Alzheimer’s: Two Experts on Why New Studies Are Encouraging," 13 Aug. 2019 There’s not much to be down with a grade 3 lesion on a meniscus besides stem cell therapy. Alaa Abdeldaiem, SI.com, "Joe Rogan Surprises MMA Fighter by Covering Expenses for Key Medical Procedure," 29 July 2019 Such lesions are ‘‘not uncommon’’ in the spring, according to NOAA’s website. Janet Mcconnaughey, BostonGlobe.com, "Nearly 300 dolphins dead on Gulf Coast, triple usual number," 14 June 2019 In others, researchers only counted lesions visible to the naked eye. A.a. Newton, SELF, "Here’s How to Tell if Your Skin-Care Products Are Actually Noncomedogenic," 8 Aug. 2019 Other issues cause similar browning, such as annual grassy weeds that die back now, but your photos show what appears to be leaf lesions of brown patch. Ellen Nibali, baltimoresun.com, "Garden Q&A: Dealing with brown patch fungus in your lawn and inedible pears," 25 July 2019 Some were covered in lesions consistent with exposure to fresh water, which might have spilled into the Gulf during the winter, officials said. Scottie Andrew And Katherine Dillinger, CNN, "A $38,000 reward is being offered after a Florida dolphin was fatally speared in the head," 12 July 2019 Only a handful of examples exist, such as Tasmanian devil facial lesions and leukemia in some clams. Jon Kelvey, Smithsonian, "The Evolution of Sex Could Have Provided a Defense Against Cancer Cells," 11 June 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'lesion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of lesion

15th century, in the meaning defined at sense 1

History and Etymology for lesion

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

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Statistics for lesion

Last Updated

25 Aug 2019

Look-up Popularity

Time Traveler for lesion

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

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More Definitions for lesion

lesion

noun

English Language Learners Definition of lesion

medical : an injured or diseased spot or area on or in the body

lesion

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

Kids Definition of lesion

: an abnormal spot or area of the body caused by sickness or injury

lesion

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

Medical Definition of lesion

 (Entry 1 of 2)

: an abnormal change in structure of an organ or part due to injury or disease especially : one that is circumscribed and well defined

Other Words from lesion

lesioned \ -​zhənd How to pronounce lesioned (audio) \ adjective

Medical Definition of lesion (Entry 2 of 2)

: to produce lesions in (as an animal's brain)

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lesion

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

Legal Definition of lesion

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

History and Etymology for lesion

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

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More from Merriam-Webster on lesion

Rhyming Dictionary: Words that rhyme with lesion

Thesaurus: All synonyms and antonyms for lesion

Spanish Central: Translation of lesion

Nglish: Translation of lesion for Spanish Speakers

Britannica English: Translation of lesion for Arabic Speakers

Britannica.com: Encyclopedia article about lesion

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