Breadcrumb Home > Dictionary > Index O onomastics: Meaning and Definition of Find definitions for: on•o•mas•tics Pronunciation: (on"u-mas'tiks), [key] — n. (used with a sing. v.) the study of the origin, history, and use of proper names. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: onomastics (Thesaurus) onomasticon onomatology TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language