air·​tight | \ ˈer-ˌtīt How to pronounce airtight (audio) \

Definition of airtight

1 : impermeable to air or nearly so an airtight seal
2a : having no noticeable weakness, flaw, or loophole an airtight argument
b : permitting no opportunity for an opponent to score an airtight defense

Keep scrolling for more

Other Words from airtight

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

Press a sheet of parchment paper directly against the surface, and seal with an airtight lid. Becky Krystal, Washington Post, "Coconut milk makes this vegan ice cream especially smooth and luscious," 9 July 2019 How does anyone capture the airtight nothingness required of a stock photo? Luke Winkie, Vox, "Vox Sentences: Turning off the red lights," 5 July 2019 The songwriting, the airtight vocal, and her positivity radiating through the music video was something I not only felt but wanted to exude myself. Nick Williams, Billboard, "Leland's #TBT Mixtape Is an Ode to the Bops That 'Made Him Gay'," 20 June 2019 The evidence that Iran attacked a pair of tankers with mines is less than airtight. Steve Chapman,, "Column: Trump’s clueless Iran policy lurches the U.S. toward war," 19 June 2019 Our virologist has blameless motives and an airtight lab. Rob Reid, Ars Technica, "In the not-so-distant future, “synbio” could lead to global catastrophe—maybe," 18 June 2019 The Marvel Cinematic Universe has stitched together more than 20 films into an airtight crochet of interlocking narratives. Peter Rubin, WIRED, "Goodbye X-Men—You Flawed, Frustrating Cinematic Revolution," 7 June 2019 The site has airtight doors and is a constant 52 degrees Fahrenheit with 90 percent humidity, said Beckley, who graduated from the Colorado School of Mines with a petroleum engineering degree. Mario Sanelli, The Denver Post, "Glenwood Springs joins Aspen as only Colorado cities completely powered by renewable energy," 3 June 2019 Cool treats completely and store in an airtight glass or plastic container. Stephanie Eckelkamp, Good Housekeeping, "How to Make Cheddar-Bacon Dog Treats That Are Way Tastier Than Store-Bought," 5 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'airtight.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of airtight

1728, in the meaning defined at sense 1

Keep scrolling for more

Learn More about airtight

Dictionary Entries near airtight


air tanker

air taxi





Statistics for airtight

Last Updated

15 Jul 2019

Look-up Popularity

Time Traveler for airtight

The first known use of airtight was in 1728

See more words from the same year

Keep scrolling for more

More Definitions for airtight



English Language Learners Definition of airtight

: tightly sealed so that no air can get in or out
: too strong or effective to fail or to be defeated


air·​tight | \ ˈer-ˈtīt How to pronounce airtight (audio) \

Kids Definition of airtight

: so tightly sealed that no air can get in or out Store the cookies in an airtight container.

Keep scrolling for more

More from Merriam-Webster on airtight

Rhyming Dictionary: Words that rhyme with airtight

Spanish Central: Translation of airtight

Nglish: Translation of airtight for Spanish Speakers

Comments on airtight

What made you want to look up airtight? Please tell us where you read or heard it (including the quote, if possible).


a small bunch of flowers

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!