/ Dictionary / Index S Sing Sing: Meaning and Definition of Find definitions for: Sing Sing Pronunciation: (sing' sing"), [key] the state prison at Ossining, New York. former name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. singly singsong Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language