/ Dictionary / Index J jackeroo: Meaning and Definition of Find definitions for: jack•e•roo Pronunciation: ( jak"u-r'), [key] — n., pl. v., -roos, -rooed, -roo•ing. —n. an inexperienced person working as an apprentice on a sheep ranch. —v.i. to work as an apprentice on a sheep ranch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jackelyn jacket Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language