noun
pneumonia
nyoo-MOH-nee-uh
noun
1
A lung infection, usually caused by bacteria or a virus, that inflames the air sacs and can fill them with fluid.
"He was hospitalized with pneumonia after the flu turned severe."
"Elderly patients are at higher risk of complications from pneumonia."
How to Use Pneumonia
Learner’s notesIn plain EnglishA serious lung infection that makes breathing difficult and often requires medical treatment.
Common pairings
develop pneumonia
bacterial pneumonia
walking pneumonia
Word Forms
pneumonias plural, pneumoniæ plural, pneumoniae plural
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Etymology
From Greek pneumon, "lung," combined with a suffix meaning "disease of."