mountain sickness


Definition of mountain sickness 

: altitude sickness experienced by mountain climbers or by those ascending or living especially above 8000 to 10,000 feet (about 2500 to 3000 meters) elevation and caused by insufficient oxygen in the air breathed especially : acute mountain sickness

Examples of mountain sickness in a Sentence

Recent Examples on the Web

After powering through unforgiving storms, hypothermia, and mountain sickness, the team completed the trek in 15 days and nine hours. National Geographic, "How Ultramarathon Runners Took on World's Most Difficult Trail," 18 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mountain sickness.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of mountain sickness

1848, in the meaning defined above

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The first known use of mountain sickness was in 1848

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mountain sickness


Medical Definition of mountain sickness 

: altitude sickness experienced especially above 8000 to 10,000 feet (about 2500 to 3000 meters) and caused by insufficient oxygen in the air especially : acute mountain sickness

More from Merriam-Webster on mountain sickness

Rhyming Dictionary: Words that rhyme with mountain sickness Encyclopedia article about mountain sickness

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What made you want to look up mountain sickness? Please tell us where you read or heard it (including the quote, if possible).


to move with a clumsy heavy tread

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