lesion

noun le·sion \ ˈlē-zhən \
Updated on: 20 Nov 2017

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 1) and well defined

lesioned

play \ˈlē-zhənd\ adjective

Recent Examples of lesion from the Web

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.

Origin and Etymology of lesion

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


LESION Defined for English Language Learners

lesion

noun

Definition of lesion for English Language Learners

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


LESION Defined for Kids

lesion

noun le·sion \ ˈlē-zhən \

Definition of lesion for Students

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

Medical Dictionary

1

lesion

noun le·sion \ ˈlē-zhən \

medical Definition of lesion

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

lesioned

play \-zhənd\ adjective

2

lesion

transitive verb

medical Definition of lesion

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

Law Dictionary

lesion

noun le·sion \ ˈlē-zhən \

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

Origin and Etymology of lesion

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



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