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English definition of “hermetically sealed”

hermetically sealed

adjective uk   /hɜːˌmet.ɪ.kliˈsiːld/ us    /hɚˌmet̬-/
specialized engineering describes a container or space that is so tightly closed that no air can leave or enter itOpen and closed disapproving separated and protected from very different conditions outside, in an unnatural way: We drove past a row of squalid shacks on the way to our hotel, where we slept in air-conditioned, hermetically sealed rooms.Separateness and isolation in spaceAlone
(Definition of hermetically sealed from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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