Definition of Lesion

1. Noun. Any localized abnormal structural change in a bodily part.

Generic synonyms: Pathology
Specialized synonyms: Tubercle, Ulcer, Ulceration

2. Noun. An injury to living tissue (especially an injury involving a cut or break in the skin).
Exact synonyms: Wound
Generic synonyms: Harm, Hurt, Injury, Trauma
Specialized synonyms: Raw Wound, Stigmata, Abrasion, Excoriation, Scrape, Scratch, Cut, Gash, Slash, Slice, Laceration, Bite

Definition of Lesion

1. n. A hurt; an injury.

Definition of Lesion

1. Noun. A wound or injury. ¹

2. Noun. An infected or otherwise injured or diseased organ or part, especially such patch of skin. ¹

3. Verb. (transitive) To wound or injure, especially in an experiment or other controlled procedure. ¹

¹ Source:

Definition of Lesion

1. to cause an abnormal change in the structure of an organ [v -ED, -ING, -S]

Medical Definition of Lesion

1. Any pathological or traumatic discontinuity of tissue or loss of function of a part. Origin: L. Laesio, laedere = to hurt This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lesion Pictures

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Lexicographical Neighbors of Lesion

lese majeste
lese majesty
lesion (current term)
lesquerolic acid

Literary usage of Lesion

Below you will find example usage of this term as found in modern and/or classical literature:

1. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1911)
"the cases that gave the majority of bad results were cases with large lesions on the left without any lesion on the right, or cases with large lesions on ..."

2. Monographic Medicine by William Robie Patten Emerson, Guido Guerrini, William Brown, Wendell Christopher Phillips, John Whitridge Williams, John Appleton Swett, Hans Günther, Mario Mariotti, Hugh Grant Rowell (1916)
"Three main types of lesion in the domain of the brachial plexus are ... (1) Upper lesion of the Brachial Plexus (Erb's Type) When the lesion affects the ..."

3. Journal of Nervous and Mental Disease by Philadelphia Neurological Society, American Neurological Association, Chicago Neurological Society, New York Neurological Association (1906)
"He had no paresis of the organs of articulation, enunciation or vocalization. The only lesion to be seen in the lateral aspect of the left ..."

4. Journal of Nervous and Mental Disease by American Neurological Association, Philadelphia Neurological Society, Chicago Neurological Society, New York Neurological Association, Boston Society of Psychiatry and Neurology (1916)
"Now, from experimental data furnished by the present investigation, it is seen that after a direct lesion in the region of the posterior commissure of the ..."

5. Surgery, Gynecology & Obstetrics by The American College of Surgeons, Franklin H. Martin Memorial Foundation (1922)
"Upon the scar a new lesion appeared which has persisted for three years. Patient in wretched condition and health. Abdominal wall and thighs studded with ..."

6. Clinical Studies in Vice and in Insanity by George Robert Wilson (1899)
"He pointed out long ago that, in dissolution of nerve function, we must have regard to the two kinds of lesion and two kinds of symptoms—the primary or ..."

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