1
: inflammation of the liver
2
: a disease or condition (such as hepatitis A or hepatitis B) marked by inflammation of the liver

Did you know?

The liver, the body's largest gland, performs many important tasks, but is also vulnerable to many illnesses. At least five types of hepatitis, labeled with the letters A–E, are caused by viruses. The most common are hepatitis A, acquired through contaminated food and water; hepatitis B, which usually travels via sexual activity or shared needles; and hepatitis C, generally passed through shared needles. Some other types, including alcoholic hepatitis (caused by drinking too much alcohol), aren't infectious. There are vaccines for types A and B, and drug treatments for A, B, and C, though the drugs aren't always effective.

Examples of hepatitis in a Sentence

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.
After years of health problems, she was diagnosed with autoimmune hepatitis. Emily St. Martin, Los Angeles Times, 28 Aug. 2026 She was previously diagnosed with autoimmune hepatitis and in 2000 received a liver transplant. Charna Flam, PEOPLE, 27 Aug. 2026 Relatives told People that that longtime TV and film actor died of pneumonia, after having been diagnosed with autoimmune hepatitis. Erik Pedersen, Deadline, 27 Aug. 2026 She was previously diagnosed with autoimmune hepatitis and received a liver transplant in 2000. Liza Esquibias, USA Today, 27 Aug. 2026 See All Example Sentences for hepatitis

Word History

Etymology

New Latin

First Known Use

circa 1751, in the meaning defined at sense 1

Time Traveler
The first known use of hepatitis was circa 1751

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Cite this Entry

“Hepatitis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hepatitis. Accessed 4 Sep. 2026.

Kids Definition

hepatitis

noun
plural hepatitides -ˈtit-ə-ˌdēz How to pronounce hepatitis (audio) also hepatitises
-ˈtīt-ə-səz
: inflammation of the liver
also : any of several virus diseases marked especially by inflammation of the liver

Medical Definition

hepatitis

noun
plural hepatitides -ˈtit-ə-ˌdēz How to pronounce hepatitis (audio) also hepatitises
-ˈtīt-ə-səz
1
: inflammation of the liver
2
: a disease or condition (as hepatitis A or hepatitis B) marked by inflammation of the liver

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