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
Actually, Alma does suffer from ulcers, which cause her extraordinary stomach pain and vomiting at inconvenient moments, and cause viewers to wonder not if but when such clumsy symbolic traits will be trotted out in the future.
—
David Fear, Rolling Stone, 9 Oct. 2025
His group is also using a new tongue dataset of 750 Internet images to examine tongue shape and oral conditions such as ulcers and cracks with the deep-learning algorithm YOLO.
—Eve Lu, Scientific American, 8 Oct. 2025
Affecting around five to 10 million people worldwide, ulcerative colitis (UC) is a long-term inflammatory disease that causes the gut lining to become swollen and develop ulcers.
—New Atlas, 7 Oct. 2025
Over time, this can lead to painful and debilitating ulcers, typically occurring on the inner side of the leg above the ankle.
—Bryant Stamford, Louisville Courier Journal, 2 Oct. 2025
See All Example Sentences for ulcer
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David Fear, Rolling Stone, 9 Oct. 2025
His group is also using a new tongue dataset of 750 Internet images to examine tongue shape and oral conditions such as ulcers and cracks with the deep-learning algorithm YOLO.
—Eve Lu, Scientific American, 8 Oct. 2025
Affecting around five to 10 million people worldwide, ulcerative colitis (UC) is a long-term inflammatory disease that causes the gut lining to become swollen and develop ulcers.
—New Atlas, 7 Oct. 2025
Over time, this can lead to painful and debilitating ulcers, typically occurring on the inner side of the leg above the ankle.
—Bryant Stamford, Louisville Courier Journal, 2 Oct. 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 17 Oct. 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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