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English definition of “hermetically sealed”

hermetically sealed

adjective     /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 adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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