/ Dictionary / Index - -esis: Meaning and Definition of Find definitions for: -esis Pronunciation: [key] a suffix of Greek origin used to form nouns of action or process: ecesis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Esidrix Esk. Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language