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See more synonyms for airtight on Thesaurus.com
  1. preventing the entrance or escape of air or gas.
  2. having no weak points or openings of which an opponent may take advantage: an airtight contract.
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Origin of airtight

First recorded in 1750–60; air1 + tight
Related formsair·tight·ly, adverbair·tight·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for airtight

impenetrable, invulnerable, irrefutable, unassailable, indisputable, closed, impermeable, shut, incontestable

Examples from the Web for airtight

Contemporary Examples of airtight

Historical Examples of airtight

  • I give you my word I could feel myself heatin' up like an airtight stove.


    Joseph C. Lincoln

  • The mild aroma of Heerenbaai-Tabak filled the airtight groundcar.


    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 (goodger@python.org)

British Dictionary definitions for airtight


  1. not permitting the passage of air either in or out
  2. having no weak points; rigid or unassailablethis categorization is hardly airtight
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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

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.

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Online Etymology Dictionary, © 2010 Douglas Harper