/ Dictionary / Index P plant kingdom: Meaning and Definition of Find definitions for: plant' king"dom Pronunciation: [key] the plants of the world collectively. Also calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Plantin plantlet Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language