Definition of airtight
1 : impermeable to air or nearly so <an airtight seal>
2a : having no noticeable weakness, flaw, or loophole <an airtight argument>b : permitting no opportunity for an opponent to score <an airtight defense>
Examples of airtight in a sentence
Store the food in an airtight container.
The defendant had an airtight alibi.
First Known Use of airtight
AIRTIGHT Defined for English Language Learners
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
Definition of airtight for Students
: so tightly sealed that no air can get in or out <Store the cookies in an airtight container.>
Seen and Heard
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