The word hermetic is commonly applied to literary or graphical symbolism that is exceedingly obscure, convoluted, or esoteric. In that context, hermeticism is the deliberate use of hermetic imagery.

The word hermetic or its derivatives may also refer to:

• Hermetic seal, an airtight seal
• Hermetica, also known as the Corpus Hermeticum or Hermetic Corpus, a corpus of Egyptian or Greek literature.
• Hermetism, the religion of the philosophical elites of Ancient Egypt.
• Hermeticism, a movement which is based upon Hermetism but separated by many centuries.
• Hermetic Alchemy, a form of alchemy practiced by Hermeticists which is the transmutation of the soul rather than metals.
• Hermetic Kabbalah, a syncretism of Kabbalah within Hermeticism
• The Hermetic Order of the Golden Dawn, a 19th century occult society
• Hermetic, a music album by Timbersound with Magne Furuholmen