This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Completely sealed, especially against the escape or entry of air.

adj. Impervious to outside interference or influence: the hermetic confines of an isolated life.

adj. Mythology Of or relating to Hermes Trismegistus or the works ascribed to him.

adj. Having to do with the occult sciences, especially alchemy; magical.

adj. Of or pertaining to Hermes Trismegistus.

adj. Of or pertaining to alchemy or occult practices.

adj. Obscure; secret or unrevealed.

adj. Isolated, away from outside influence.

adj. Airtight or gas-tight; impervious to air or gases.

adj. Of, pertaining to, or taught by, Hermes Trismegistus. Hence: Alchemical; chemic.

adj. Of or pertaining to the system which explains the causes of diseases and the operations of medicine on the principles of the hermetic philosophy, and which made much use, as a remedy, of an alkali and an acid.

adj. Made perfectly close or air-tight by fusion, so that no gas or spirit can enter or escape. See Note under Hermetically.

Of or pertaining to Hermes.

[cap. or lowercase] Pertaining to Hermes Trismegistus, or to the theosophy, cosmogony, and later alchemy and astrology associated with his name; alchemic.

Of or pertaining to a hermes: as, a hermetic column.

adj. completely sealed; completely airtight

"It is progressive to not only increase knowledge of the world, but to spread this knowledge as widely as possible; to wrap one's arguments in hermetic language is itself reactionary, supporting the position that there is a select "elite" who can understand these issues and cutting pretty much everyone else off from them."

tight    hermetical   

hermetic column    hermetic art    hermetic medicine    hermetic seal   

hermetically   

hermetical    hermeticity    hermetically sealed    hermetic seal   

chemic   

closed-off    trifold    existentialist    axial-flow    synoptic    thermostatic    long-closed    O-ring    air-tight    talismanic