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English definition of “altitude”

altitude

noun [C] uk   /ˈæl.tɪ.tjuːd/ us    /-t̬ə.tuːd/
height above sea level: We are currently flying at an altitude of 15,000 metres. Mountain climbers use oxygen when they reach higher altitudes.
(Definition of altitude from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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