air·​tight | \ˈer-ˌtīt \

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

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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

Compote can be made up to 4 days ahead of time and kept in an airtight container in refrigerator. Lisa Ludwinski, WSJ, "Pies That Bind: Thanksgiving Recipes From the Heartland," 15 Nov. 2018 Transfer to an airtight container and refrigerate for up to 2 weeks. Michaela Bechler, Vogue, "Be Ambitious This Thanksgiving: 3 Bold Recipes From One of L.A.’s Most Talked About Restaurants," 2 Nov. 2018 Also, because tea tree oil can oxidize when exposed to too much light and air, Mitan recommends choosing a product with airtight, dark packaging and using it within the timeframe recommended on the label. Krissy Brady, SELF, "What Tea Tree Oil Can and Can’t Do for Your Skin," 4 Oct. 2018 Through most of 1866, the case against Davis seemed airtight. Fergus M. Bordewich, WSJ, "‘The Lost Indictment of Robert E. Lee’ Review: The Cost of Conciliation," 12 July 2018 The massive airtight doors were locked with an iron bolt. Jay Winik, WSJ, "Trump’s Critics Desecrate the Holocaust," 21 June 2018 In a high-stakes industry where competitive edges are built on subjectivity and interpretation, here comes a cold and uncomfortable and airtight point straight from the mouth of a rival scout. Sam Mellinger, kansascity, "Here's why the Royals should at least be open to trading Salvador Perez," 15 June 2018 Figures are airtight yet textureless, with eyes like pinholes. New York Times, "Can You Illustrate Emotional Absence? These Graphic Novels Do," 31 May 2018 More than 60,000 names, serial numbers, branches of the military and dates of service of men and women from the San Antonio area who served in Vietnam are permanently encased inside the memorial in an airtight compartment. Kyle Ringo, San Antonio Express-News, "San Antonio’s Vietnam Veterans Memorial built with thousands of small contributions," 27 May 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.

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First Known Use of airtight

1728, in the meaning defined at sense 1

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Dictionary Entries near airtight


air tanker

air taxi





Statistics for airtight

Last Updated

2 Dec 2018

Look-up Popularity

Time Traveler for airtight

The first known use of airtight was in 1728

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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 \

Kids Definition of airtight

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

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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

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the figure or shape of a crescent moon

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