/ Dictionary / Index J Jim Crowism: Meaning and Definition of Find definitions for: Jim' Crow'ism Pronunciation: (krō'iz-um), [key] See(def. 1). any policy of racial segregation. advocacy of such a policy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jim Crow Jim Crow law Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language