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[air-tahyt] /ˈɛərˌtaɪt/
preventing the entrance or escape of air or gas.
having no weak points or openings of which an opponent may take advantage:
an airtight contract.
Origin of airtight
1750-60; air1 + tight
Related forms
airtightly, adverb
airtightness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for airtight
Contemporary Examples
Historical Examples
  • Like almost everything else, the power-cartridge plant was airtight and had its own oxygen-generator.

    The Cosmic Computer Henry Beam Piper
  • The bodies had been walled in well enough, but those walls were not airtight.

    The Iron Ration George Abel Schreiner
  • The clock is enclosed in an airtight glass case so as to avoid barometric error.

  • It was airtight above or below that one spot on the throttle.

    Test Pilot David Goodger (
  • On the final day, Markwith was given a chance to redeem himself, and pitched an airtight game.

    Baseball Joe, Home Run King Lester Chadwick
British Dictionary definitions for airtight


not permitting the passage of air either in or out
having no weak points; rigid or unassailable: this categorization is hardly airtight
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for airtight

also air-tight, "impervious to air," 1760, from air (n.1) + tight. Figurative sense of "incontrovertible" (of arguments, alabis, etc.) is from 1929.

Online Etymology Dictionary, © 2010 Douglas Harper
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