/ Dictionary / Index U unduly: Meaning and Definition of Find definitions for: un•du•ly Pronunciation: (un-d'lē, -dy'-), [key] — adv. excessively: unduly worried. in an inappropriate, unjustifiable, or improper manner: unduly critical. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unduly (Thesaurus) undulatus undying 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