altitude sickness
noun
: the effects (such as headache, nausea, or swelling of the brain) of oxygen deficiency in the blood and tissues developed at high altitudes having reduced atmospheric pressure see mountain sickness
Examples of altitude sickness in a Sentence
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Low oxygen levels at this altitude may cause altitude sickness or breathing problems, so acclimatization is essential.
—
Kathleen Peddicord, Forbes.com, 30 June 2025
On Thursday, June 26, the father of 14-year-old Zane Wach shared an update on the teen's health following an incident two weeks ago, in which Zane began experiencing hallucinations due to what doctors believe was altitude sickness.
—Charlotte Phillipp, People.com, 29 June 2025
During their 19-hour hike, Ryan said his son began showing signs of altitude sickness, according to NBC affiliate KSNV.
—Charlotte Phillipp, People.com, 29 June 2025
Talk about some of the challenges of the race, including potentially altitude sickness.
—Morgan Korn, ABC News, 21 June 2025
See All Example Sentences for altitude sickness
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Kathleen Peddicord, Forbes.com, 30 June 2025
On Thursday, June 26, the father of 14-year-old Zane Wach shared an update on the teen's health following an incident two weeks ago, in which Zane began experiencing hallucinations due to what doctors believe was altitude sickness.
—Charlotte Phillipp, People.com, 29 June 2025
During their 19-hour hike, Ryan said his son began showing signs of altitude sickness, according to NBC affiliate KSNV.
—Charlotte Phillipp, People.com, 29 June 2025
Talk about some of the challenges of the race, including potentially altitude sickness.
—Morgan Korn, ABC News, 21 June 2025
See All Example Sentences for altitude sickness
Cite this Entry
“Altitude sickness.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/altitude%20sickness. Accessed 26 Jul. 2025.
Copy CitationMedical Definition
altitude sickness
noun
al·ti·tude sickness
ˌal-tə-ˌt(y)üd- 
: the effects (as nosebleed, nausea, headache, or cerebral edema) of oxygen deficiency in the blood and tissues developed at high altitudes with reduced atmospheric pressure
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