/ Dictionary / Index U undercellar: Meaning and Definition of Find definitions for: un•der•cel•lar Pronunciation: (un'dur-sel"ur), [key] — n. a cellar beneath another cellar; subbasement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undercast undercharge Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language