/ Dictionary / Index U undersheriff: Meaning and Definition of Find definitions for: un•der•sher•iff Pronunciation: (un'dur-sher"if), [key] — n. a sheriff 's deputy, esp. one on whom the sheriff 's duties devolve when the office is vacant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undersexed undershirt 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