Definition of lesion in US English:

lesion

noun

Medicine
  • A region in an organ or tissue which has suffered damage through injury or disease, such as a wound, ulcer, abscess, or tumor.

    • ‘Indeed, patients with coronary disease have numerous lesions, but only a few cause angina.’
    • ‘The most common presenting lesions are papules, vesicles, pustules, and nodules.’
    • ‘We also recorded the presence and severity of scabies, abscesses, and fungal lesions.’
    • ‘The region of the lesion is injected with a blue dye and radioisotope tracer.’
    • ‘It was felt the likely cause of the abscess was an open lesion from the patient's severe eczema.’
    wound, injury, bruise, abrasion, contusion, scratch, scrape, cut, gash, laceration, tear, puncture
    View synonyms

Origin

Late Middle English: via Old French from Latin laesio(n-), from laedere ‘injure’.

Pronunciation

lesion

/ˈlēZHən//ˈliʒən/