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. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: antecedent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language