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
It’s used in combination with misoprostol, which the FDA has separately approved to treat stomach ulcers.
—
Sara Cline, Fortune, 24 May 2024
As a defense mechanism, ladybugs secrete a substance that can cause painful mouth and stomach ulcers, Watkins says.
—Clare Mulroy, USA TODAY, 9 May 2024
See all Example Sentences for ulcer 
Sara Cline, Fortune, 24 May 2024
As a defense mechanism, ladybugs secrete a substance that can cause painful mouth and stomach ulcers, Watkins says.
—Clare Mulroy, USA TODAY, 9 May 2024
See all Example Sentences for ulcer
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ulcer.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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Cite this Entry
“Ulcer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ulcer. Accessed 31 May. 2024.
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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