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noun

lesion

/ˈliːʒən/  ·  say it: LEE·zhun

an area of damaged or abnormal tissue

In Medicine & Health

In more detail

1. (noun) an area of damage or injury to skin or tissue in or on the body, often caused by disease, accident, or injury

2. (noun) an area of damage to the brain or other organ that affects how it works

Examples

How to use lesion

Lesion is a medical or clinical term used to describe abnormal changes in tissue, whether visible (like a skin lesion) or internal (like a brain lesion detected by imaging). It is more technical and objective than general words like wound or injury, and does not necessarily imply acute trauma—it can result from disease, degeneration, or chronic conditions.

Register: formal

Common phrases

Synonyms

wound · injury · sore · damage · abnormality

Word family

lesioned (adjective)

A common mistake

Learners sometimes use lesion too informally or with minor injuries; it is primarily a medical or scientific term and sounds odd when applied to trivial cuts or scratches.

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