[ hur-met-ik ]
/ hɜrˈmɛt ɪk /
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made airtight by fusion or sealing.
not affected by outward influence or power; isolated.
(sometimes initial capital letter) of, relating to, or characteristic of occult science, especially alchemy.
(initial capital letter) of or relating to Hermes Trismegistus or the writings ascribed to him.
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Also her·met·i·cal .
Origin of hermetic
OTHER WORDS FROM hermeticun·her·met·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use hermetic in a sentence
The pressure of the neck of the bottle against this disk is such that the closing is absolutely hermetical.
His measure of usefulness became full in 1798 when the hermetical seal of death closed his bright career.Sages and Heroes of the American Revolution|L. Carroll Judson
A sect of hermetical philosophers, founded in the fifteenth century, who were engaged in the study of abstruse sciences.The Symbolism of Freemasonry|Albert G. Mackey
The closing is made hermetical by means of an India rubber tube, K, which presses against the glass and the cover.
The nuts are screwed up tight, and the flange of the door, compressing the rubber lining, renders the joint hermetical.
British Dictionary definitions for hermetic (1 of 2)
/ (hɜːˈmɛtɪk) /
sealed so as to be airtight
hidden or protected from the outside world
Derived forms of hermetichermetically, adverb
Word Origin for hermetic
C17: from Medieval Latin hermēticus belonging to Hermes Trismegistus, traditionally the inventor of a magic seal
British Dictionary definitions for hermetic (2 of 2)
/ (hɜːˈmɛtɪk) /
of or relating to Hermes Trismegistus or the writings and teachings ascribed to him
of or relating to ancient science, esp alchemy
esoteric or recondite
Word Origin for Hermetic
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