/ Dictionary / Index D diagrammatic: Meaning and Definition of Find definitions for: di•a•gram•mat•ic Pronunciation: (dī"u-gru-mat'ik), [key] — adj. in the form of a diagram; graphic; outlined. pertaining to diagrams. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diagrammatic (Thesaurus) diagram diagraph Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language