Definition of ulcer in English:



  • 1An open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane which fails to heal. Ulcers range from small, painful sores in the mouth to bedsores and serious lesions of the stomach or intestine.

    • ‘Gingival ulceration in herpetic stomatitis is common and is associated with mouth ulcers elsewhere and fever’
    • ‘Along with the external ulcer, the internal arterial lesion must be treated.’
    • ‘Treating and preventing constipation may improve the symptoms and heal the ulcer.’
    • ‘Its efficacy in superficial diabetic ulcers or ischemic diabetic ulcers has not been evaluated.’
    • ‘These are more likely when the disease is active and include skin rashes, mouth ulcers, joint pains and anaemia.’
    • ‘Painful skin ulcers with gangrenous margins may be a feature of mixed bacterial infections.’
    • ‘Cells like that have been used to prevent cirrhosis of the liver and to heal diabetic ulcers and for drug testing.’
    • ‘A mouth ulcer is a painful sore in the mouth on either the cheeks or gums.’
    • ‘If the H. pylori germs are killed, your stomach ulcer or gastritis can be cured.’
    • ‘The 13 year-old suffered from serious skin ulcers on his right knee and the wound festered upward to his thigh.’
    • ‘Sometimes the stomach acid or the ulcer itself breaks a blood vessel in the lining of the stomach or duodenum.’
    • ‘This is an autoimmune skin disorder that begins with lesions and skin ulcers on the face.’
    • ‘The commonest causes of vasculitic ulcers are rheumatoid arthritis, systemic lupus, and polyarteritis nodosa.’
    • ‘A common form of mouth ulcer, canker sores occur in women more often than in men.’
    • ‘This reduces the chance of getting pressure ulcers (bed sores) and of developing a deep vein thrombosis.’
    • ‘They can give you stomach ulcers, make you bruise more easily, and even harm your liver and kidneys.’
    • ‘If you receive the bacteria by injection, it can cause skin ulcers and regional swelling of lymph nodes.’
    • ‘In most cases, treating the H. pylori infection allows the ulcer, or ulcers, to heal and prevents them from recurring.’
    • ‘They are also afflicted with painful skin ulcers and stomach problems.’
    • ‘Like other chronic wounds, pressure ulcers fail to heal in a timely manner.’
    sore, ulceration, open sore, abscess, boil, carbuncle, pustule, blister, cyst, gumboil, wen
    canker sore
    aphtha, chancre, furuncle, vesication, noma
    gathering, fester, impostume
    View synonyms
    1. 1.1A moral blemish or corrupting influence.
      ‘he's a conman with an incurable ulcer called gambling’


Late Middle English: from Latin ulcus, ulcer-.