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

More recently, she was beset by an array of serious health problems, ranging from pneumonia to breast cancer. —Corey Seymour, Vogue, 31 Jan. 2025

Jan Shepard, who acted opposite Elvis Presley in 1958’s King Creole and 1966’s Paradise, Hawaiian Style, and appeared in more than 30 TV Westerns, died Jan. 17 at a hospital in Burbank, Calif. of pneumonia brought on by respiratory failure. —Natalie Oganesyan, Deadline, 27 Jan. 2025

Living close to large poultry operations may increase the risk of contracting pneumonia, a 2018 study conducted in Pennsylvania found. —Ames Alexander, Charlotte Observer, 26 Jan. 2025

This new lung disease AI model gives us a clue as to what is yet to come, with it able to correctly identify nuances that differentiate, for example COVID-19 from pneumonia. —New Atlas, 23 Jan. 2025

Word History

Etymology

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

First Known Use

1603, in the meaning defined above

Phrases Containing pneumonia

• double pneumonia
• Pneumocystis carinii pneumonia
• primary atypical pneumonia
• walking pneumonia

Kids 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