/ Dictionary / Index I isograph: Meaning and Definition of Find definitions for: i•so•graph Pronunciation: (ī'su-graf", -gräf"), [key] — n. (in the study of the geographical distribution of a dialect) a line drawn on a map to indicate areas having common linguistic characteristics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isogram isogriv Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language