Hermetically in a Sentence 

Definition of Hermetically  

in an airtight manner, sealed

Examples of Hermetically in a sentence

An astronaut’s suit must be hermetically sealed so his precious oxygen doesn’t escape into the vacuum of space.  
Scuba suits are hermetically sealed so the air stays in the suit and the water stays out of it.  
Because the pressure difference between the outside air and the cabin of an airplane is very high, the cabin is always hermetically sealed.  

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