Definition of altitude sickness noun from the Oxford Advanced Learner's Dictionary


altitude sickness

BrE BrE//ˈæltɪtjuːd sɪknəs//
; NAmE NAmE//ˈæltɪtuːd sɪknəs//
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illness caused by a lack of oxygen, because of being very high above sea level, for example on a mountain
See the Oxford Advanced American Dictionary entry: altitude sickness