/ Dictionary / Index P prince royal: Meaning and Definition of Find definitions for: prince' roy'al Pronunciation: [key] the eldest son of a king or queen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prince regent Prince Rupert Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language