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 Word Forms

• airtightly adverb
• airtightness noun

Word History and Origins

Origin of airtight¹

First recorded in 1750–60; air ¹ + tight

Example Sentences

Control room operators at Daiichi were wearing full gear, but the airtight radiation suits weren’t made for long-term use.

Read more on Literature

"And we're also knocking down old buildings, making our homes warmer, more airtight - there are less places for them to go."

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Teasing out the plot’s tangled threads and expecting each to adhere to logic is a fool’s errand, yet what viewer will insist this type of picture have an airtight story?

Read more on The Wall Street Journal

In motherhood, the margin for error is airtight.

Read more on Salon

This stone is too porous, that boulder is too jagged; none of them has a square footage large enough to crush me so flat that an airtight seal will form between myself and the ground.

Read more on Salon

Related Words

• indisputable 
• invulnerable 
• irrefutable 
• unassailable