/ Dictionary / Index O old growth: Meaning and Definition of Find definitions for: old' growth' Pronunciation: [key] forest growth consisting of mature or overmature trees. virgin timber. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. old gold Old Guard Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language