/ Dictionary / Index U underpopulated: Meaning and Definition of Find definitions for: un•der•pop•u•lat•ed Pronunciation: (un"dur-pop'yu-lā"tid), [key] — adj. having a population lower than is normal or desirable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: underpopulated (Thesaurus) underplot underpraise Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language