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the effects (as nosebleed or nausea) of oxygen deficiency in the blood and tissues at high altitudes


state noun (stable states of affairs)



Original source:

Princeton WordNet


altitude sickness | mountain sickness | puna [Latin America]

Definition references


altitude sickness [medicine] | apoxia [synonym] | mountain sickness [synonym]

A pathological condition caused by oxygen deficiency at high altitudes; symptoms include shortness of breath, nausea, and nosebleed. (18 of 20 words)

en​.wiktionary​.org​/wiki​/altitude sickness


Altitude sickness | acute mountain sickness | AMS | altitude illness | hypobaropathy | the altitude bends | soroche

a pathological effect of high altitude on humans, caused by acute exposure to low partial pressure of oxygen at high altitude. It commonly occurs above 2,400 metres. It presents as a collection of nonspecific symptoms, acquired at high altitude or in... (41 of 3862 words, 1 image)

en​.wikipedia​.org​/wiki​/Altitude sickness

Britannica Encyclopedia:

altitude sickness | mountain sickness [synonym]

acute reaction to a change from sea level or other low-altitude environments to altitudes above 8,000 feet. Altitude sickness was recognized as early ... (23 of 416 words)


Collins Dictionary:

mountain sickness | altitude sickness [synonym, sense-specific]

nausea, headache, and shortness of breath caused by climbing to high altitudes (usually above 12 000 ft) | [veterinary science] a disease of cattle ... (23 of 309 words, 2 definitions, 4 usage examples)


Columbia Encyclopedia:

decompression sickness | altitude sickness | decompression sicknesses

physiological disorder caused by a rapid decrease in atmospheric pressure, resulting in the release of nitrogen bubbles into the body tissues. It's ... (22 of 291 words)


Macmillan British Dictionary:

altitude sickness [uncountable]

an illness caused by the small amount of oxygen in the air when you are very high up, for example on a mountain (23 of 49 words)



altitude sickness

the effects (as headache, nausea, or swelling of the brain) of oxygen deficiency in the blood and tissues developed at high altitudes having reduced ... (24 of 40 words)

www​.merriam-webster​.com​/dictionary​/altitude sickness

Oxford Dictionary:

altitude sickness | mountain sickness

illness caused by ascent to high altitude, characterized by hyperventilation, nausea, and exhaustion resulting from shortage of oxygen (18 of 40 words)


American Heritage Dictionary:

altitude sickness

A collection of symptoms, including shortness of breath, headache, and nosebleed, brought on by decreased oxygen in the atmosphere, such as that ... (22 of 29 words)


Random House Dictionary:

altitude sickness [pathology]

a condition affecting some persons at high altitudes, caused by insufficient oxygen in the blood and characterized by dizziness, nausea, and shortness ... (22 of 27 words)


New World Dictionary:


a cold, arid plateau high in the Andes (8 of 17 words, pronunciation)


Encarta Dictionary:

altitude sickness | mountain sickness [medicine]

a condition caused by low levels of oxygen in the air at high altitudes, resulting in nausea and breathlessness (19 of 30 words)

encarta​.msn​.com​/dictionary 1861685364​/definition​.html  [offline]

Page last updated: 2013-06-26

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