pneumonia
noun
pneu·mo·nia
nu̇-ˈmō-nyə 
nyu̇-
: 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
John MacArthur, pastor of Grace Community Church (GCC) in Sun Valley, California, has reportedly been hospitalized with pneumonia following years of health complications.
—
Julia Bonavita, FOXNews.com, 14 July 2025
Askren was admitted to a Wisconsin hospital in May with a severe case of pneumonia.
—Dave Smith, Fortune, 11 July 2025
The former Olympic wrestler and MMA fighter underwent a double lung transplant after suffering a severe case of pneumonia, according to numerous updates posted on Facebook by his wife, Amy, starting June 7.
—Los Angeles Times, 11 July 2025
But Retton, who's 57, was diagnosed with a rare form of pneumonia in October 2023.
—Raechal Shewfelt, EW.com, 10 July 2025
See All Example Sentences for pneumonia
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Julia Bonavita, FOXNews.com, 14 July 2025
Askren was admitted to a Wisconsin hospital in May with a severe case of pneumonia.
—Dave Smith, Fortune, 11 July 2025
The former Olympic wrestler and MMA fighter underwent a double lung transplant after suffering a severe case of pneumonia, according to numerous updates posted on Facebook by his wife, Amy, starting June 7.
—Los Angeles Times, 11 July 2025
But Retton, who's 57, was diagnosed with a rare form of pneumonia in October 2023.
—Raechal Shewfelt, EW.com, 10 July 2025
See All Example Sentences for pneumonia
Cite this Entry
“Pneumonia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pneumonia. Accessed 21 Jul. 2025.
Copy CitationKids Definition
pneumonia
noun
pneu·mo·nia
n(y)u̇-ˈmō-nyə
: a disease of the lungs marked by inflammation, congestion, fever, cough, and difficulty in breathing and caused especially by infection
Medical Definition
pneumonia
noun
pneu·mo·nia
n(y)u̇-ˈmō-nyə
: 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
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