diarrhea
noun
di·ar·rhea
ˌdī-ə-ˈrē-ə 
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
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
Like all medicines in the class known as GLP-1s, the Wegovy pill is also associated with side effects such as nausea, vomiting, constipation and diarrhea.
—
Tami Luhby, CNN Money, 6 Jan. 2026
Not all children develop substantial symptoms; most of those who do experience a few days of fever, vomiting, and diarrhea, and then get better.
—Katherine J. Wu, The Atlantic, 6 Jan. 2026
Pets with salmonella infections may be lethargic and have diarrhea or bloody diarrhea, fever, and vomiting.
—Michele Laufik, Martha Stewart, 6 Jan. 2026
The rotavirus vaccine, which protects against a highly contagious gastrointestinal infection that causes severe diarrhea in infants and young children, was previously recommended beginning at 2 months of age as either a two- or three-dose series.
—Jordana Comiter, PEOPLE, 6 Jan. 2026
See All Example Sentences for diarrhea
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Tami Luhby, CNN Money, 6 Jan. 2026
Not all children develop substantial symptoms; most of those who do experience a few days of fever, vomiting, and diarrhea, and then get better.
—Katherine J. Wu, The Atlantic, 6 Jan. 2026
Pets with salmonella infections may be lethargic and have diarrhea or bloody diarrhea, fever, and vomiting.
—Michele Laufik, Martha Stewart, 6 Jan. 2026
The rotavirus vaccine, which protects against a highly contagious gastrointestinal infection that causes severe diarrhea in infants and young children, was previously recommended beginning at 2 months of age as either a two- or three-dose series.
—Jordana Comiter, PEOPLE, 6 Jan. 2026
See All Example Sentences for diarrhea
Cite this Entry
“Diarrhea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diarrhea. Accessed 7 Jan. 2026.
Copy CitationKids Definition
diarrhea
noun
di·ar·rhea
ˌdī-ə-ˈrē-ə
: 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
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