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Showing results for airtight.
Definitions

airtight

[air-tahyt] / ˈɛərˌtaɪt /
ADJECTIVE
sealed
Synonyms
STRONGEST
impenetrable
WEAK
closed impermeable shut
Antonyms
WEAK
loose open penetrable permeable possible questionable uncertain unclosed unsealed
ADJECTIVE
certain
Synonyms
STRONGEST
indisputable invulnerable irrefutable unassailable
WEAK
incontestable
Antonyms
STRONGEST
doubtful dubious questionable refutable uncertain
WEAK
loose open penetrable permeable possible unclosed unsealed

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Andrew Crawford, of US non-profit the Center for Democracy and Technology, said it was "crucial" to maintain "airtight" safeguards around users' health information.

From BBC • Jan. 8, 2026

Also read: Your estate plan needs to be absolutely airtight.

From MarketWatch • Dec. 24, 2025

Store the cookies in an airtight container at room temperature for up to 5 days.

From Salon • Dec. 13, 2025

Each fruit sample was sealed in an airtight container, and the team recorded details including species, size, color and softness.

From Science Daily • Dec. 1, 2025

After we all shook hands in Tepper's office he smiled smugly and said, "This is the most airtight case I've ever taken before a judge."

From "Hole in My Life" by Jack Gantos