Definition of stratosphere noun from the Oxford Advanced Learner's Dictionary

 

stratosphere

 noun
noun
BrE BrE//ˈstrætəsfɪə(r)//
 
; NAmE NAmE//ˈstrætəsfɪr//
 
the stratosphere[singular] The Earth and the atmosphere
 
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  • the layer of the earth’s atmosphere between about 10 and 50 kilometres above the surface of the earth compare ionosphere See related entries: The Earth and the atmosphere
  • Idioms
    in/into the stratosphere(informal)
     
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    at or to an extremely high level The technology boom sent share prices into the stratosphere. See related entries: The Earth and the atmosphere
    See the Oxford Advanced American Dictionary entry: stratosphere