1
: impermeable to air or nearly so
an airtight seal
2
a
: having no noticeable weakness, flaw, or loophole
an airtight argument
b
: permitting no opportunity for an opponent to score
an airtight defense
airtightness
noun
Examples of airtight in a Sentence
Store the food in an airtight container.
The defendant had an airtight alibi.
Recent Examples on the Web
Their defense is hardly airtight, but the schedule — the full schedule, not just the conference lineup — is largely devoid of teams capable of slowing the Cowboys’ attack.
—
Jon Wilner, The Mercury News, 15 May 2024
The band was absolutely airtight, with drummer Daru Jones, bassist Dominic John Davis and keyboardist Quincy McCrary matching White’s on-stage improvisation to a tee.
—Ellise Shafer, Variety, 15 Jan. 2023
See all Example Sentences for airtight 
Jon Wilner, The Mercury News, 15 May 2024
The band was absolutely airtight, with drummer Daru Jones, bassist Dominic John Davis and keyboardist Quincy McCrary matching White’s on-stage improvisation to a tee.
—Ellise Shafer, Variety, 15 Jan. 2023
See all Example Sentences for airtight
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'airtight.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near airtight
Cite this Entry
“Airtight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/airtight. Accessed 28 May. 2024.
Copy CitationKids Definition
airtight
adjective
air·tight
-ˈtīt 
1
: so tightly sealed that no air can get in or out
an airtight container
2
: too strong or effective to fail or be defeated
an airtight argument
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