/ Dictionary / Index R royal palm: Meaning and Definition of Find definitions for: roy'al palm' Pronunciation: [key] any of several tall, showy feather palms of the genus Roystonea, as R. regia, having a trunk that is swollen in the middle. See illus. under. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Royal Oak royal poinciana Related Content Daily Word Quiz: prevalent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language