Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “airtight”


adjective    /ˈeərˌtɑɪt/
completely shut so that no air can get in or out: Put the cookies in an airtight jar to keep them fresh.
(Definition of airtight adjective from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of airtight

Definitions of “airtight” in other dictionaries

Word of the Day


When a boat or a ship sails, it travels on the water.

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More