airtight

[ air-tahyt ]

adjective

1. preventing the entrance or escape of air or gas.
2. having no weak points or openings of which an opponent may take advantage:

   an airtight contract.

airtight

/ ˈɛəˌtaɪt /

adjective

1. not permitting the passage of air either in or out
2. having no weak points; rigid or unassailable

   this categorization is hardly airtight

Other Words From

• airtightly adverb
• airtightness noun

Word History and Origins

Origin of airtight¹

First recorded in 1750–60; air ¹ + tight

Example Sentences

The ballots are nearly airtight and testing by fire officials “showed that anything flammable should extinguish very quickly,” he said.

From Los Angeles Times

The neighbor’s sign, while biting, underscored an emerging reality in Arizona’s sizable Latter-day Saints community — that while church members are overwhelmingly Republican, there is some erosion in their traditionally airtight support for Republicans.

From Los Angeles Times

For items like sugar, dried fruits and nuts, transferring them into airtight canisters will help keep pests at bay.

From Salon

And that they'd tried to adhere to the Crumbl storage requirements, which advises that the products can still be consumed after three days, if kept in an airtight container.

From BBC

When it comes to storing your backyard bounty for the long haul, Gogol recommends putting it in airtight Mylar bags, Mason jars or tins — but to steer clear of the old-school Ziploc bag.

From Los Angeles Times

Related Words

• indisputable
• invulnerable
• irrefutable
• unassailable