/ Dictionary / Index U undercard: Meaning and Definition of Find definitions for: un•der•card Pronunciation: (un'dur-kärd"), [key] an event or group of events preceding and supporting a featured event: the undercard of tonight's boxing match. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. undercapitalize undercarriage 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