pneumonia

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noun pneu·mo·nia \nu̇-ˈmō-nyə, nyu̇-\

Definition of pneumonia

  1. :  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

  1. He caught pneumonia over the winter.

Recent Examples of pneumonia from the Web

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.

Origin and Etymology of pneumonia

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


PNEUMONIA Defined for English Language Learners

pneumonia

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noun

Definition of pneumonia for English Language Learners

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


PNEUMONIA Defined for Kids

pneumonia

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

Definition of pneumonia for Students

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


Medical Dictionary

pneumonia

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

Medical Definition of pneumonia

  1. :  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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