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      Airtight

      /ˈɛrtaɪt/

      Meaning & Definition

      adjective
      Unable to allow air or gas to pass through; sealed.
      The container is designed to be airtight to keep the food fresh.
      Impenetrable; impossible to refute or challenge.
      The lawyer presented an airtight case that convinced the jury.
      Not admitting any possibility of failure or leakage.
      The team has developed an airtight strategy to ensure the project's success.

      Etymology

      Late 19th century; from air + tight.

      Common Phrases and Expressions

      airtight alibi:
      An alibi that is so strong that it cannot be disproven.

      Related Words

      seal
      To close something securely and prevent entry or escape.
      impermeable
      Not allowing fluid to pass through.
      secure
      Fixed or fastened tightly.

      Slang Meanings

      Unassailably convincing or effective.
      His plan was airtight, and everyone agreed it would work.