/
həːˈmɛtɪk/
adj.
- (of a seal or closure) complete and airtight.
- insulated or protected from outside influences.
-
(also Hermetic)
of or denoting an ancient occult tradition encompassing alchemy, astrology, and theosophy.
▸esoteric; cryptic.
Derivative
- hermetically adv.
- hermeticism n.
Etymology
C17: from mod. L. hermeticus, from Hermes Trismegistus, the legendary founder of alchemy and astrology identified with the Greek god Hermes.