also her·met·i·cal (-ĭ-kəl)adj.
- Completely sealed, especially against the escape or entry of air.
- Impervious to outside interference or influence: the hermetic confines of an isolated life.
- often Hermetic
- Mythology. Of or relating to Hermes Trismegistus or the works ascribed to him.
- Having to do with the occult sciences, especially alchemy; magical.
[New Latin hermēticus, alchemical, from Medieval Latin Hermēs (Trismegistus). See Hermes Trismegistus.]
hermetically her·met'i·cal·ly adv.








