airtight
Americanadjective
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preventing the entrance or escape of air or gas.
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having no weak points or openings of which an opponent may take advantage.
an airtight contract.
adjective
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not permitting the passage of air either in or out
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having no weak points; rigid or unassailable
this categorization is hardly airtight
Other Word Forms
- airtightly adverb
- airtightness noun
Etymology
Origin of airtight
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
More: Your estate plan needs to be absolutely airtight.
From MarketWatch • Dec. 12, 2025
Each fruit sample was sealed in an airtight container, and the team recorded details including species, size, color and softness.
From Science Daily • Dec. 1, 2025
Teasing out the plot’s tangled threads and expecting each to adhere to logic is a fool’s errand, yet what viewer will insist this type of picture have an airtight story?
From The Wall Street Journal • Oct. 28, 2025
This stone is too porous, that boulder is too jagged; none of them has a square footage large enough to crush me so flat that an airtight seal will form between myself and the ground.
From Salon • Aug. 20, 2025
Since limits are logically airtight, by defining a derivative in terms of limits, it becomes airtight as well—and puts calculus on a solid foundation.
From "Zero: The Biography of a Dangerous Idea" by Charles Seife
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
