/ Dictionary / Index U underlit: Meaning and Definition of Find definitions for: un•der•lit Pronunciation: (un"dur-lit'), [key] — adj. lacking adequate light. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. underling underlying 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