/ Dictionary / Index P prejudicial: Meaning and Definition of Find definitions for: prej•u•di•cial Pronunciation: (prej"u-dish'ul), [key] — adj. causing prejudice or disadvantage; detrimental. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prejudicial (Thesaurus) prejudice prelacy Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language