ulcer

noun

ul·​cer ˈəl-sər 

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

Some people should avoid oxymel, such as those with acid reflux or a stomach ulcer. —Julia Ries Wexler, Health, 7 Nov. 2025

Originally scheduled for July 20, the event was postponed when Tyson suffered an ulcer flare-up in May 2024. —Erik Pedersen, Deadline, 3 Nov. 2025

The 2025 postseason, which ended when the Los Angeles Dodgers beat the Toronto Blue Jays in the 11th inning of the seventh game of an ulcer-inducing World Series, stands with any in baseball history. —Steve Rushin, The Atlantic, 2 Nov. 2025

Scientists first used the approach to design a drug-delivery robot that could treat ulcers inside the body. —Neetika Walter, Interesting Engineering, 20 Oct. 2025

Word History

Etymology

Middle English, from Latin ulcer-, ulcus; akin to Greek helkos wound

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing ulcer

• anti-ulcer
• decubitus ulcer
• gastric ulcer
• mouth ulcer
• peptic ulcer
• rodent ulcer

Rhymes for ulcer

• pulser

Kids 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

ulcer

2 of 2 verb

ulcered; ulcering ˈəls-(ə-)riŋ 

: ulcerate