1
: a break in skin or mucous membrane with loss of surface tissue, disintegration and necrosis of epithelial tissue, and often pus
2
: something that festers and corrupts like an open sore
ulcer
verb
Examples of ulcer in a Sentence
Recent Examples on the Web
Similarly, aloe vera mouthwash reduced the severity of oral mucositis, a condition that causes ulcers and inflammation inside the mouth.
—
Brittany Lubeck, Verywell Health, 2 June 2025
Kofman, who works in the hospital’s wound department, wanted to try a new course on one patient’s injury caused by venous ulcers that stubbornly refused to heal despite years of attempts.
—Daniel I. Dorfman, Chicago Tribune, 23 May 2025
Symptoms can include swollen joints, ulcers and skin lesions, and meningitis.
—Discover Magazine, 8 May 2025
Diabetes is a lifelong condition whose consequences can be varied: nerve damage, heart disease, digestive problems, foot ulcers.
—Dhruv Khullar, New Yorker, 28 Apr. 2025
See All Example Sentences for ulcer
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Brittany Lubeck, Verywell Health, 2 June 2025
Kofman, who works in the hospital’s wound department, wanted to try a new course on one patient’s injury caused by venous ulcers that stubbornly refused to heal despite years of attempts.
—Daniel I. Dorfman, Chicago Tribune, 23 May 2025
Symptoms can include swollen joints, ulcers and skin lesions, and meningitis.
—Discover Magazine, 8 May 2025
Diabetes is a lifelong condition whose consequences can be varied: nerve damage, heart disease, digestive problems, foot ulcers.
—Dhruv Khullar, New Yorker, 28 Apr. 2025
See All Example Sentences for ulcer
Cite this Entry
“Ulcer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ulcer. Accessed 9 Jun. 2025.
Copy CitationKids Definition
ulcer
noun
ul·cer
ˈəl-sər 
: a slow-healing open sore in which tissue breaks down
Medical Definition
ulcer
1 of 2 noun
ul·cer
ˈəl-sər
: a break in skin or mucous membrane with loss of surface tissue, disintegration and necrosis of epithelial tissue, and often pus
a stomach ulcer
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