hermetic
hermetic /hɜːˈmet.ɪk/ aep /hɚˈmet̬-/ adjective
1 F0 SPECIALIZED (of a container) so tightly closed that no air can leave or enter: » a hermetic sealThesaurus+: ↑Open and closed2 F0 FORMAL If a particular group is hermetic, the people who live within it don't often communicate with those who live outside it: » He entered the hermetic world of the monastery at a young age.Thesaurus+: ↑Lifestyles and their study |