/ Dictionary / Index S side card: Meaning and Definition of Find definitions for: side' card" Pronunciation: [key] — Cards. Cards. the highest card in a hand that is not part of a scoring combination, as not being one of a pair, three of a kind, etc., and that serves to determine by its denomination the higher ranking of two otherwise equal hands. a card other than a trump; plain card. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sidecar side chain Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language