- 1(technology) tightly closed so that no air can escape or enter synonym airtight
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- 2(formal) (disapproving) closed and difficult to become a part of the strange, hermetic world of the theater
NAmE//hərˈmɛt̮ɪkli//
adverb a hermetically sealed containerSee hermetic in the Oxford Advanced Learner's DictionaryCheck pronunciation: hermetic