diarrhea

noun

di·​ar·​rhea ˌdī-ə-ˈrē-ə How to pronounce diarrhea (audio)
Synonyms of diarrheanext
1
: abnormally frequent intestinal evacuations with more or less fluid stools (see stool entry 1 sense 3a)
Symptoms of the disease include fever, nausea, and diarrhea.
2
: excessive flow
verbal diarrhea
diarrheal adjective
diarrheic adjective
diarrhetic adjective

Examples of diarrhea in a Sentence

The symptoms of the disease include fever, nausea, and diarrhea. I was taken with severe diarrhea while attending the conference.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The most common side effects among the trial group were nausea, diarrhea and vomiting. Jackie Flynn Mogensen, Scientific American, 19 Mar. 2026 Early symptoms include nausea, vomiting, fatigue, appetite loss and diarrhea. Bestreviews, Mercury News, 18 Mar. 2026 Most people infected with salmonella can experience a range of symptoms including abdominal pain, fever, headache, watery diarrhea that may also have blood or mucus, loss of appetite, nausea, and vomiting, according to the CDC. Gma Team, ABC News, 17 Mar. 2026 Another worry is these products induce bowel movements that cause diarrhea, says Ahmed, which sometimes leads to dehydration, malabsorption, nutrient deficiencies and electrolyte imbalances. Sarah Boden, NPR, 16 Mar. 2026 See All Example Sentences for diarrhea

Word History

Etymology

Middle English diaria, from Late Latin diarrhoea, from Greek diarrhoia, from diarrhein to flow through, from dia- + rhein to flow — more at stream

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of diarrhea was in the 14th century

Browse Nearby Words

Cite this Entry

“Diarrhea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diarrhea. Accessed 24 Mar. 2026.

Kids Definition

diarrhea

noun
di·​ar·​rhea ˌdī-ə-ˈrē-ə How to pronounce diarrhea (audio)
: abnormally frequent and watery bowel movements

Medical Definition

diarrhea

noun
di·​ar·​rhea
variants or chiefly British diarrhoea
: abnormally frequent intestinal evacuations with more or less fluid stools

More from Merriam-Webster on diarrhea

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