/ Dictionary / Index D Donatus: Meaning and Definition of Find definitions for: Do•na•tus Pronunciation: (dō-nā'tus), [key] — n. early-4th-century bishop of Casae Nigrae in northern Africa: leader of a heretical Christian group. Cf. 4th century a.d., Roman grammarian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: donatus (Thesaurus) donatory Donau Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language