Meaning of the word hermetically in English

What does hermetically mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

hermetically

US /hɚˈmet̬.ɪk.li/
UK /-i/

Adverb

in a way that is completely airtight

Example:
The food was sealed hermetically in a vacuum-packed bag.
The laboratory was kept hermetically sealed to prevent contamination.