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n. - The outer region of the Earth's atmosphere.

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Usage examples (33)
  • CFCs are also safe, inert and nonpoisonous-until they reach the ionosphere, that is.
  • The ionosphere is the wayward child of the sun; even now, its behaviour is not always predictable.
  • The ionosphere is a duo-layered crust of particles several miles thick holding the atmosphere in place.
  • Instead, the device was able to detect where the ionosphere, which is driven by flows in space, and the atmosphere meet.
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We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.