/ Dictionary / Index T toponymy: Meaning and Definition of Find definitions for: to•pon•y•my Pronunciation: (tu-pon'u-mē), [key] — n. the study of toponyms. the nomenclature of the regions of the body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: toponymy (Thesaurus) toponym topos Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language