Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Impermeable by air.
  • adjective Having no weak points; sound.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Being impermeable to air or other gases.
  • adjective figuratively Having no weak points or flaws (as in an "airtight" argument).

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

air +‎ tight

Examples

Comments

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