airtight

adjective air·tight \ ˈer-ˌtīt \

Definition of airtight

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

  1. Store the food in an airtight container.

  2. The defendant had an airtight alibi.

Recent Examples of airtight from the Web

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.

First Known Use of airtight

1728

in the meaning defined at sense 1

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AIRTIGHT Defined for English Language Learners

airtight

Definition of airtight for English Language Learners

  • : tightly sealed so that no air can get in or out

  • : too strong or effective to fail or to be defeated


AIRTIGHT Defined for Kids

airtight

adjective air·tight \ ˈer-ˈtīt \

Definition of airtight for Students

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


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