Legionnaires' disease

noun
Le·​gion·​naires' disease | \ ˌlē-jə-ˈnerz- How to pronounce Legionnaires' disease (audio) \
variants: or less commonly Legionnaire's disease

Definition of Legionnaires' disease

: pneumonia that is caused by a bacterium (Legionella pneumophila), is characterized initially by symptoms resembling influenza (as malaise, headache, and muscular aches) followed by high fever, cough, diarrhea, severe pneumonia, and mental confusion, and that may be fatal especially in elderly and immunocompromised individuals

First Known Use of Legionnaires' disease

1976, in the meaning defined above

History and Etymology for Legionnaires' disease

from its first recognized occurrence at an American Legion convention in 1976

Keep scrolling for more

Buying Guide

Our team at The Usage has selected the best window air conditioners of 2021.

Learn More About Legionnaires' disease

Time Traveler for Legionnaires' disease

Time Traveler

The first known use of Legionnaires' disease was in 1976

See more words from the same year

Dictionary Entries Near Legionnaires' disease

legionnaire

Legionnaires' disease

Legion of Honor

See More Nearby Entries 

Statistics for Legionnaires' disease

Cite this Entry

“Legionnaires' disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Legionnaires%27%20disease. Accessed 21 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for Legionnaires' disease

Legionnaires' disease

noun

English Language Learners Definition of Legionnaires' disease

: a serious disease of the lungs that is caused by bacteria

Legionnaires' disease

noun
variants: also Legionnaire's disease

Medical Definition of Legionnaires' disease

: pneumonia that is caused by a bacterium of the genus Legionella (L. pneumophila), that is characterized initially by symptoms resembling influenza (as malaise, headache, and muscular aches) followed by high fever, cough, diarrhea, lobar pneumonia, and mental confusion, and that may be fatal especially in elderly and immunocompromised individuals — see pontiac fever

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!