pneumonia

noun
pneu·​mo·​nia | \ nu̇-ˈmō-nyə, nyu̇-\

Definition of pneumonia

: an acute disease that is marked by inflammation of lung tissue accompanied by infiltration of alveoli and often bronchioles with white blood cells (such as neutrophils) and fibrinous exudate, is characterized by fever, chills, cough, difficulty in breathing, fatigue, chest pain, and reduced lung expansion, and is typically caused by an infectious agent (such as a bacterium, virus, or fungus) — see bronchopneumonia, pneumocystis carinii pneumonia, primary atypical pneumonia — compare pneumonitis

Examples of pneumonia in a Sentence

He caught pneumonia over the winter.

Recent Examples on the Web

Legendary Hollywood screenwriter William Goldman has died at the age of 87 from colon cancer and pneumonia, The New York Times reports. Jennifer Ouellette, Ars Technica, "RIP William Goldman, creator of beloved film, The Princess Bride," 16 Nov. 2018 Ecker’s father, at 89, requires full-time oxygen for emphysema and had contracted pneumonia. Lauran Neergaard, The Seattle Times, "AP-NORC Poll: Many caregivers neglecting their own health," 15 Oct. 2018 People who become infected with the disease have pneumonia-like symptoms, including fever, chills, headache, fatigue and confusion. Melanie Grayce West, WSJ, "Legionnaires’ Disease Outbreak Kills One and Sickens 15 in Northern Manhattan," 11 Oct. 2018 Higher levels of exposure can cause chest pain, more severe breathing difficulties, vomiting, pneumonia, and fluid in the lungs. Kyle Mizokami, Popular Mechanics, "U.S. Soldier Found Guilty of Building, Exploding Poison Gas Bomb," 26 Sep. 2018 Doctors were conducting a battery of tests on the boys, and X-rays showed that two might have pneumonia. New York Times, "Freed From Thai Cave, Boys May Still Face Health Problems," 10 July 2018 Paul suffered several fractured ribs and subsequently contracted pneumonia, according to the release. Holly V. Hays, Indianapolis Star, "Neighbor who attacked Sen. Rand Paul is sentenced to 30 days," 15 June 2018 Some questioned whether Amelia had two ear infections, and others thought the baby had pneumonia. Char Adams, PEOPLE.com, "Calif. Mom Opens Up After Learning Infant's Ear Infection Was Deadly Cancer: 'We Were Scared'," 7 May 2018 His two-year-old son has pneumonia, and is being treated inside. The Economist, "Unwanted everywhereEven for Rohingya refugees who move on from Bangladesh, life is grim," 25 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pneumonia.' 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 pneumonia

1603, in the meaning defined above

History and Etymology for pneumonia

New Latin, from Greek, from pneumōn lung, alteration of pleumōn — more at pulmonary

Keep scrolling for more

Learn More about pneumonia

Statistics for pneumonia

Last Updated

11 Jan 2019

Look-up Popularity

Time Traveler for pneumonia

The first known use of pneumonia was in 1603

See more words from the same year

Keep scrolling for more

More Definitions for pneumonia

pneumonia

noun

English Language Learners Definition of pneumonia

medical : a serious disease that affects the lungs and makes it difficult to breathe

pneumonia

noun
pneu·​mo·​nia | \ nu̇-ˈmō-nyə, nyu̇-ˈmō-\

Kids Definition of pneumonia

: a serious illness affecting the lungs that is marked especially by fever, cough, and difficulty in breathing

pneumonia

noun
pneu·​mo·​nia | \ n(y)u̇-ˈmō-nyə \

Medical Definition of pneumonia

: an acute disease that is marked by inflammation of lung tissue accompanied by infiltration of alveoli and often bronchioles with white blood cells (as neutrophils) and fibrinous exudate, is characterized by fever, chills, cough, difficulty in breathing, fatigue, chest pain, and reduced lung expansion, and is typically caused by an infectious agent (as a bacterium, virus, or fungus) — see bronchopneumonia, lobar pneumonia, pneumocystis carinii pneumonia, primary atypical pneumonia

Keep scrolling for more

More from Merriam-Webster on pneumonia

Rhyming Dictionary: Words that rhyme with pneumonia

Spanish Central: Translation of pneumonia

Nglish: Translation of pneumonia for Spanish Speakers

Britannica English: Translation of pneumonia for Arabic Speakers

Britannica.com: Encyclopedia article about pneumonia

Comments on pneumonia

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

WORD OF THE DAY

important, real, or meaningful

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

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