Hermeticism, a magical and religious movement stemming from the teachings of Hermes Trismegistus.

Hermetic Order of the Golden Dawn, a 19th century occult society

The word hermetic is commonly applied to literary or graphical symbolism that is exceedingly obscure, convoluted, or esoteric. In that context, and not in any other context, hermeticism is the deliberate use of hermetic imagery. The word hermetic or its derivatives may also refer to:

Hermetica, also known as the Corpus Hermeticum or Hermetic Corpus, a corpus of Egyptian or Greek literature

The Hermetic Order of the Golden Dawn, Inc., a modern occult society

Hermetic (soundtrack album), a music album by Timbersound with Magne Furuholmen

Hermetic detector, a particle detector with large-angle coverage, designed to observe as many particles from an interaction as possible.

Hermética, an Argentine heavy metal band

Hermetic seal, an airtight seal

Hermetic Brotherhood of Luxor, an initiatic occult organisation that first became public in late 1884.