Airtight

To be airtight was not to allow any air to escape. Circuit housings on Deep Space 9 were airtight. () 
The term could also describe an alibi's accuracy. In, Odo informed Garak that Kira Nerys had an airtight alibi for his attempted murder. ()
==See also==
* Airlock
* Hermetic seal
==External link==
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Category:Slang
Category:Science