/ Dictionary / Index S sustaining program: Meaning and Definition of Find definitions for: sustain'ing pro"gram Pronunciation: [key] a radio or television program without a commercial sponsor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sustainer sustenance Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language