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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
First recorded in 1750-60; air1 + tight
Related forms
airtightly, adverb
airtightness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for airtight
Contemporary Examples
Historical Examples
  • I give you my word I could feel myself heatin' up like an airtight stove.

    Mary-'Gusta Joseph C. Lincoln
  • The mild aroma of Heerenbaai-Tabak filled the airtight groundcar.

    Wind Charles Louis Fontenay
  • It was not airtight, but there would probably be no further investigation.

    The Perfectionists Arnold Castle
  • The bodies had been walled in well enough, but those walls were not airtight.

    The Iron Ration

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

    Test Pilot David Goodger (
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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