pneumonia

American  

[noo-mohn-yuh, -moh-nee-uh, nyoo-] / nʊˈmoʊn yə, -ˈmoʊ ni ə, nyʊ- /

noun

Pathology.

1. inflammation of the lungs with congestion.

2. Also called lobar pneumonia.  an acute disease of the lungs, caused by the bacterium Streptococcus pneumoniae and characterized by fever, a cough with blood-tinged phlegm, and difficult breathing.

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pneumonia British  

/ njuːˈməʊnɪə /

noun

1. inflammation of one or both lungs, in which the air sacs (alveoli) become filled with liquid, which renders them useless for breathing. It is usually caused by bacterial (esp pneumococcal) or viral infection

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pneumonia Scientific  

/ n-mōn′yə /

1. An acute or chronic disease marked by inflammation of the lungs, especially an infectious disease caused by viruses, bacteria, or other pathogens, such as mycoplasmas. Individuals with pneumonia often have abnormal chest x-rays that show areas with fluid in the infected part of the lungs.

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pneumonia Cultural  

1. A disease characterized by inflammation of the lungs. Pneumonia can be caused by many factors, including bacterial infections, viral infections, and the inhalation of chemical irritants.

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Etymology

Origin of pneumonia

First recorded in 1595–1605; from New Latin, from Greek pneumonía; equivalent to pneumon- + -ia

Compare meaning

How does pneumonia compare to similar and commonly confused words? Explore the most common comparisons:

• atelectasis vs. pneumonia
• pleurisy vs. pneumonia
• ammonia vs. pneumonia

Example Sentences

"I'm doing this to pray for the healing of my seven-month-old baby, who is suffering from pneumonia," John David, clutching a whip in one hand, told AFP at the beginning of the procession.

From Barron's • Apr. 3, 2026

Liverpool icon Toshack previously spent two weeks on a ventilator in a Barcelona hospital after contracting Covid-19 and pneumonia.

From BBC • Mar. 25, 2026

Coerte Voorhees had tapped Kilmer, who died of pneumonia last year after years of battling throat cancer, for "As Deep as the Grave," about the pioneering archaeologist Ann Morris, a co-discoverer of the Anasazi civilization.

From Barron's • Mar. 18, 2026

"Individuals recovering from severe viral pneumonia, particularly those with smoking history, may benefit from enhanced lung cancer surveillance, and preventing severe infection through vaccination may confer indirect cancer protection benefits."

From Science Daily • Mar. 13, 2026

And then, three or four years later she'd got double pneumonia and died.

From "And Then There Were None" by Agatha Christie