Definition of hermetically adverb from the Oxford Advanced Learner's Dictionary



    BrE BrE//hɜːˈmetɪkli//
    ; NAmE NAmE//hɜːrˈmetɪkli//
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  1. 1(specialist) in a way that is tightly closed so that no air can escape or enter a hermetically sealed container
  2. 2(formal, disapproving) in a way that is closed and difficult to become a part of Washington should encourage the country to open up its almost hermetically closed society.