/ Dictionary / Index B big casino: Meaning and Definition of Find definitions for: big' casi'no Pronunciation: [key] (in the game of casino) the ten of diamonds. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Big C big cheese Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language