/ Dictionary / Index H hermetically: Meaning and Definition of Find definitions for: her•met•i•cal•ly Pronunciation: (hûr-met'ik-lē), [key] — adv. so as to be airtight: hermetically sealed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hermetically (Thesaurus) hermetic Hermeticism Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language