Of, pertaining to, or taught by, Hermes Trismegistus; as, hermetic philosophy. Hence: Alchemical; chemic.
- Completely sealed, especially against the escape or entry of air.
- Impervious to outside interference or influence: the hermetic confines of an isolated life.
- Mythology Of or relating to Hermes Trismegistus or the works ascribed to him.
- Having to do with the occult sciences, especially alchemy; magical.