Breadcrumb Home > Dictionary > Index J jackaroo: Meaning and Definition of Find definitions for: jack•a•roo Pronunciation: ( jak"u-r'), [key] — pl. v.i., -roos, -rooed, -roo•ing. jackeroo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jack arch jackass 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: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language