/ Dictionary / Index C convertible debenture: Meaning and Definition of Find definitions for: convert'ible deben'ture Pronunciation: [key] a convertible bond that is not secured with collateral. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. convertible bond convertible insurance Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language