Definitions

1. noun

A diseased or damaged part of the body, or an area of abnormal tissue

“The doctor examined the patient’s skin lesion”

2. noun

A pathological change in a tissue or organ

“The lab report confirmed the presence of a lesion in the patient’s lung”

3. noun

A mark or spot on the skin, especially one caused by disease or injury

“The woman had a large lesion on her arm”

4. noun

A region of abnormal electrical activity in the brain

“The EEG detected a lesion in the patient’s brain”