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
In 2025, Ozog joined more than 20 specialists in a major consensus review, which concluded that the therapy was safe and effective for several types of ulcer, peripheral neuropathy, acute radiation dermatitis and androgenic alopecia, a type of pattern hair loss.
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Lynne Peeples, Scientific American, 26 Mar. 2026
At the same time, residents were losing significant weight and developing malnutrition, enduring life-threatening pressure ulcers and repeatedly suffering unwitnessed falls, in part due to understaffing, James alleged.
—Eli Cahan, ProPublica, 23 Mar. 2026
She was plagued with all manner of rashes, sores and ulcers.
—Anthony Robledo, USA Today, 22 Mar. 2026
She was plagued with all manner of rashes, sores, and ulcers.
—Amanda Peet, New Yorker, 21 Mar. 2026
See All Example Sentences for ulcer
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Lynne Peeples, Scientific American, 26 Mar. 2026
At the same time, residents were losing significant weight and developing malnutrition, enduring life-threatening pressure ulcers and repeatedly suffering unwitnessed falls, in part due to understaffing, James alleged.
—Eli Cahan, ProPublica, 23 Mar. 2026
She was plagued with all manner of rashes, sores and ulcers.
—Anthony Robledo, USA Today, 22 Mar. 2026
She was plagued with all manner of rashes, sores, and ulcers.
—Amanda Peet, New Yorker, 21 Mar. 2026
See All Example Sentences for ulcer
Cite this Entry
“Ulcer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ulcer. Accessed 29 Mar. 2026.
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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