peri·to·ni·tis | \ˌper-ə-tə-ˈnī-təs \

Definition of peritonitis 

: inflammation of the peritoneum

Examples of peritonitis in a Sentence

Recent Examples on the Web

The famous magician, illusionist, and entertainer definitely died from peritonitis caused by a ruptured appendix, but the real reason for his death is a mystery due to multiple contradicting reports. Lauren Smith, Good Housekeeping, "18 Fascinating Things You Didn't Know About Halloween," 7 July 2018 The blockage caused the whale to develop peritonitis, an infection of the abdomen, leading to its death. Don Sweeney, sacbee, "A sperm whale died from eating 64 pounds of plastic litter, marine experts say | The Sacramento Bee," 9 Apr. 2018 The elder Pulman died June 17, 1940, of a coronary occlusion related to a ruptured appendix with general peritonitis, according to his death certificate. Paula Allen, San Antonio Express-News, "Mystery man in family photo might be former President Roosevelt," 23 Dec. 2017 The 2-year-old boy, A.J. Burgess, was taken to the hospital on Sunday morning for peritonitis, an abdominal infection, his family said on their GoFundMe page. Elizabeth Chuck, NBC News, "Georgia Boy, 2, Denied Kidney Transplant Rushed to the Emergency Room," 31 Oct. 2017 But the family fears that may be too late. 'His body is weakening' A.J. was admitted to the hospital Sunday with peritonitis, according to the family's attorney Mawuli Davis. Cydney Henderson, USA TODAY, "Toddler who was denied dad's kidney is hospitalized," 31 Oct. 2017 The family's attorney, Mawuli Davis, said A.J. was admitted into the hospital Sunday with peritonitis, an inflammation of the tissue lining the inner wall of the abdomen caused by a bacterial or fungal infection. Lindsey Bever, Washington Post, "Toddler hospitalized after his father’s arrest prevented a kidney donation," 30 Oct. 2017 Perforation allows the contents of the intestines to leak into the abdominal space, causing an infection called peritonitis. Korin Miller, SELF, "Sean Hayes Needed Emergency Surgery After His Small Intestine ‘Burst Open’," 26 Oct. 2017 According to medical investigations, Beever died of peritonitis, which is the inflammation of the abdominal wall, Lincolnshire Live reports. Eileen Reslen, Seventeen, "16-Year-Old Girl Dies From A Rare Condition After A Hairball Is Found Inside Her Stomach," 19 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'peritonitis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of peritonitis

1771, in the meaning defined above

History and Etymology for peritonitis

New Latin

Keep scrolling for more

Learn More about peritonitis

Share peritonitis

Statistics for peritonitis

Look-up Popularity

Time Traveler for peritonitis

The first known use of peritonitis was in 1771

See more words from the same year

Keep scrolling for more

More Definitions for peritonitis



English Language Learners Definition of peritonitis

medical : a serious condition in which the covering of the stomach, intestines, and nearby organs becomes swollen and infected


peri·to·ni·tis | \ˌper-ət-ᵊn-ˈīt-əs \

Medical Definition of peritonitis 

: inflammation of the peritoneum

More from Merriam-Webster on peritonitis

See words that rhyme with peritonitis Encyclopedia article about peritonitis

Comments on peritonitis

What made you want to look up peritonitis? Please tell us where you read or heard it (including the quote, if possible).


required by fashion, etiquette, or custom

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!