/ Dictionary / Index U undergrowth: Meaning and Definition of Find definitions for: un•der•growth Pronunciation: (un'dur-grōth"), [key] — n. low-lying vegetation or small trees growing beneath larger trees; underbrush. the condition of being undergrown or undersized. short, fine hair underlying longer, outer wool or fur. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: undergrowth (Thesaurus) undergrown underhand Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language