/ Dictionary / Index G Gregory of Nyssa: Meaning and Definition of Find definitions for: Greg'ory of Nys'sa Pronunciation: (nis'u), [key] a.d. c330–395?, Christian bishop and theologian in Asia Minor (brother of Saint Basil). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gregory XVI Gregory of Tours Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language