thin air

English

Pronunciation

  • IPA(key): /ˌθɪn ˈɛə(ɹ)/
  • Audio (General Australian):(file)

Noun

thin air (uncountable)

  1. (idiomatic, figuratively, usually humorous) An unknown location; (by extension) apparent disappearance or nonexistence.
    Where did you think the exhaust would go? Into thin air?
  3. Used other than figuratively or idiomatically: see thin,‎ air,‎ (especially, low-density air as a result of high altitude).
    You'll need to stay mindful of taking breaks, drinking water, and avoiding overexertion up here, because you're dealing with thin air at this altitude.

See also

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