English Reference

Word

pneumonia

Phoneticspneu·mo·nia

US/nəˈmoʊnjə/

UK/njuːmˈəʊniə/

Definition

n. a serious illness that affects your lungs and makes it hard to breathe. It is usually caused by an infection from bacteria or a virus.

n. an inflammatory condition of the lung affecting primarily the microscopic air sacs known as alveoli. Typically caused by infection with viruses or bacteria and less commonly by other microorganisms, certain drugs, or autoimmune diseases.

Examples

“He spent a week in the hospital recovering from pneumonia.”

“The doctor prescribed a course of antibiotics to treat the bacterial pneumonia and clear the patient's lungs.”

“While modern medicine has significantly reduced the mortality rate, pneumonia remains a leading cause of death among the elderly and those with compromised immune systems worldwide.”

Examples

simple

“He spent a week in the hospital recovering from pneumonia.”

contextual

“The doctor prescribed a course of antibiotics to treat the bacterial pneumonia and clear the patient's lungs.”

complex

“While modern medicine has significantly reduced the mortality rate, pneumonia remains a leading cause of death among the elderly and those with compromised immune systems worldwide.”

Usage

Uncountable when referring to the disease in general; countable when referring to a specific case or instance of the illness.

Real-World Examples

“Some weeks later they were informed she had died of double pneumonia in Los Angeles.”
The Guardian · 16 Jul 2026
“Alexander came to power in March 1855, after his father, Nicholas I , died of pneumonia .”
Smithsonian Magazine · 27 Jul 2026

Etymology

From Ancient Greek πνευμονία (pneumonía, “lung disease”), from πνεύμων (pneúmōn, “lung”) + -ία (-ía).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

englishreference.com/q/pneumonia

English Reference