/ Dictionary / Index U underbite: Meaning and Definition of Find definitions for: un•der•bite Pronunciation: (un'dur-bīt"), [key] — n. Dentistry. occlusion in which the lower incisor teeth overlap the upper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. underbid underbodice Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language