hermetic Meaning in the Cambridge English Dictionary
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Meaning of “hermetic” in the English Dictionary

"hermetic" in British English

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uk   /hɜːˈmet.ɪk/  us   /hɚˈmet̬-/
specialized engineering (of a ​container) so ​tightlyclosed that no ​air can ​leave or ​enter: a hermetic seal formal If a ​particulargroup is hermetic, the ​people who ​live within it don't often ​communicate with those who ​liveoutside it: He ​entered the hermetic ​world of the ​monastery at a ​youngage.
adverb /-i/
(Definition of hermetic from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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