airtight

adjective

Definition of airtightnext
1
as in watertight

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Dissimilar Words
2
as in bulletproof

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Dissimilar Words

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of airtight Natural corks, while not entirely airtight, typically allow only a minimal amount of oxygen to enter over time. — Roger Dooley, Forbes, 12 Dec. 2024 These passed our leak test, but our avocado browned quite a bit overnight, suggesting that these containers aren’t entirely airtight. — Lizzy Briskin, Peoplemag, 9 Sep. 2024 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 But the United States' employment verification scheme is hardly airtight. — Edward Alden, Foreign Affairs, 11 Feb. 2013 See All Example Sentences for airtight
Recent Examples of Synonyms for airtight
  1. watertight
  2. bulletproof
  3. hermetic
  4. special
  5. leakproof
  6. high-grade
  7. dense
  8. accurate
Adjective
  • For now, access appears limited to the steadily expanding group of organizations granted access to Claude Mythos Preview through Anthropic’s — not entirely watertight — private Project Glasswing initiative.
    — Robert Hart, The Verge, 9 June 2026
  • Tunnels are also not truly watertight, requiring drainage measures like sump pumps and creating maintenance and reliability issues, the group advised.
    — Skyler Swisher, The Orlando Sentinel, 15 Feb. 2026
Definition of watertight
Adjective
  • The Spurs are almost as bulletproof as Oklahoma City on that end of the floor, but the Thunder have a bit more versatility and are more seasoned.
    — James L. Edwards III, New York Times, 27 May 2026
  • Later grants were used to install bulletproof glass around a playground near the street, as well as bulletproof glass in other classroom windows.
    — Jeff McDonald, San Diego Union-Tribune, 25 May 2026
Definition of bulletproof
Adjective
  • O’Neill, a physics professor at Princeton, argued for the practical possibility of building human habitats that would float between Earth and the moon, housing tens of thousands of people in hermetic environments with earthlike gravity and climate.
    — Jacob Weisberg, Vanity Fair, 10 Sep. 2026
  • This hermetic secrecy is how Allure beauty director Sarah Kinonen and I recently found ourselves in the bathroom of a suite in the Aman hotel on New York’s Fifth Avenue, brushing our teeth while members of the Dyson public relations team looked on.
    — Jenny Bailly, Allure, 1 Sep. 2026
Definition of hermetic
Adjective
  • The café uses a special roast from an NKC small-batch roaster called Northlandia, according to Stevie Rose, marketing specialist at Life Unlimited.
    — Kansas City Star, Kansas City Star, 15 Oct. 2026
  • The production won the Tony Award for special theatrical event.
    — Andrea Flores, Los Angeles Times, 15 Oct. 2026
Definition of special
Adjective
  • Cadence capsules are magnetic, stackable, and leakproof cases to hold liquids most conveniently.
    — Nneya Richards, Travel + Leisure, 11 Oct. 2026
  • The real genius is the second lid, which turns the whole thing into a leakproof pitcher.
    — Alaina Chou, Bon Appetit Magazine, 31 Aug. 2026
Definition of leakproof
Adjective
  • NexGen is constructing a large high-grade uranium mine and mill in Canada under its Rook I Project, which is expected to be completed by 2030.
    — Liz Napolitano, CNBC, 21 Sep. 2026
  • Founded in 1998, Mitsuwa Market offers an array of authentic Japanese ingredients, including high-grade rice, miso, seaweed, snacks and condiments.
    — Gagandeep Singh, Sacbee.com, 15 Sep. 2026
Definition of high-grade
Adjective
  • This is a dense picture—there’s almost too much to unpack, if you can be bothered to care about any of it.
    — Stephanie Zacharek, Time, 16 Oct. 2026
  • Supplemental screening will move into the mainstream for women with dense breasts.
    — Samantha Agate, Miami Herald, 16 Oct. 2026
Definition of dense
Adjective
  • State officials said the isolated instances of noncitizens voting, if accurate, are not evidence of widespread voter fraud.
    — Kevin Rector, Los Angeles Times, 20 Oct. 2026
  • To make good decisions, consumers need to rely on accurate information, but much of the hype around peptides is misleading.
    — Amy Maxmen, Miami Herald, 19 Oct. 2026
Definition of accurate

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air taxis
airtight
airway
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Cite this Entry

“Airtight.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/airtight. Accessed 20 Oct. 2026.

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