: of or relating to the mystical and alchemical writings or teachings arising in the first three centuries a.d. and attributed to Hermes Trismegistus
b
: relating to or characterized by subjects that are mysterious and difficult to understand : relating to or characterized by occultism or abstruseness : recondite
a hermetic discussion
2
[from the belief that Hermes Trismegistus invented a magic seal to keep vessels airtight]
Hermetic derives from Greek via the Medieval Latin word hermeticus. When it first entered English in the early 17th century, hermetic was associated with writings attributed to Thoth, the Egyptian god of wisdom. Thoth, whom the Greeks called Hermes Trismegistus ("thrice-great Hermes"), was believed to be the author of a number of mystical, philosophical, and alchemistic works. The obscure subject matter of these works may have made them difficult to wade through, for soon English speakers were also applying hermetic to things that were beyond ordinary human comprehension. Additionally, Hermes Trismegistus was said to have invented a magic seal that could keep vessels airtight. Hermetic thus came to mean "airtight," both literally and figuratively. These days, it can also sometimes mean "solitary."
wrote hermetic poetry whose sole intended readership was himself
Recent Examples on the WebUnder my leadership, QRS manufacturing processes and techniques were re-designed for mass-production primarily in fork fabrication, fork balancing and hermetic packaging, and final assembly, calibration and test. Stephen Ibaraki, Forbes, 12 July 2022 Winslow Homer, dour and hermetic, spent the last decades of his life perched in his small studio above the sharp stone ledges of Prouts Neck, Maine. Globe Staff, BostonGlobe.com, 23 June 2022 There’s something hermetic about her work that feels true to New York. Alice Mcdermott, New York Times, 22 June 2022 The environment is hermetic, though her disposition is bubbly. Kelly Crow, WSJ, 18 June 2022 What’s more, the action takes place in a hermetic bubble, floating somewhere above New Jersey and the world, with no connection to anything more tangible than a screenwriter’s keyboard. Richard Brody, The New Yorker, 16 June 2022 Rhyming poets tended to be liberals, trying to make poetry high-hearted and popular again at a moment when the hermetic side of modernism seemed exhausted. Adam Gopnik, The New Yorker, 23 May 2022 Similarly, the hermetic North Korea has been test-firing ballistic missiles amid a coronavirus outbreak, a possible risk to South Korea’s manufacturing sector should the brinksmanship escalate. Josh Boak, BostonGlobe.com, 20 May 2022 What, beyond the suggestion of a tobacco factory, lay beyond the hermetic seal of this set? Michael Andor Brodeur, Washington Post, 15 May 2022 See More
Word History
Etymology
Medieval Latin hermeticus, from Hermet-, Hermes Trismegistus