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  • hermetic
    hermetic
    adjective
    made airtight by fusion or sealing.
  • Hermetic
    Hermetic
    adjective
    of or relating to Hermes Trismegistus or the writings and teachings ascribed to him
Synonyms

hermetic

American  
[hur-met-ik] / hɜrˈmɛt ɪk /
Also hermetical

adjective

  1. made airtight by fusion or sealing.

  2. not affected by outward influence or power; isolated.

  3. (sometimes initial capital letter) of, relating to, or characteristic of occult science, especially alchemy.

  4. (initial capital letter) of or relating to Hermes Trismegistus or the writings ascribed to him.


Hermetic 1 British  
/ hɜːˈmɛtɪk /

adjective

  1. of or relating to Hermes Trismegistus or the writings and teachings ascribed to him

  2. of or relating to ancient science, esp alchemy

  3. esoteric or recondite

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

hermetic 2 British  
/ hɜːˈmɛtɪk /

adjective

  1. sealed so as to be airtight

  2. hidden or protected from the outside world

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of hermetic

1630–40; < Medieval Latin hermēticus of, pertaining to Hermes Trismegistus, equivalent to Latin Hermē ( s ) Hermes + -ticus -tic

Explanation

If you want to keep cookies crisp for a long time, store them in a jar with a hermetic, or airtight, seal. Hermetic means sealed so that no air can get in. The word can be used metaphorically as well. A child who is completely protected from the outside world might be said to come from a hermetic environment. The word comes from the name of the Greek god, Hermes Trismegistus, who was a magician and alchemist and was credited with creating the process for making a completely airtight glass tube, a god-like feat if there ever was one.

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Vocabulary lists containing hermetic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He read about the Hermetic Order of the Golden Dawn, the 19th-century occult group that counted Crowley, W.B.

From New York Times • Sep. 26, 2018

On top of the history of jewelry, he has studied alchemy, the Hermetic sciences, and medieval astrology.

From The New Yorker • Jun. 7, 2016

Though her fellow historians view Yates’ 1964 book Giordano Bruno and the Hermetic Tradition as her greatest achievement, it is Yates’ book on memory that has proved to be her most popular work by far.

From Slate • Nov. 23, 2015

Nonetheless, it does locate some legitimate and poignant correspondences between modern positive thinking and ancient Hermetic philosophy.

From Time • Oct. 24, 2013

Well, I never imagined that Nemu-Pha would unlock the Hermetic wisdom to me.

From The Tour A Story of Ancient Egypt by Couperus, Louis