/ Dictionary / Index S sustention: Meaning and Definition of Find definitions for: sus•ten•tion Pronunciation: (su-sten'shun), [key] — n. the act of sustaining. the state or quality of being sustained. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sustentation sustineo alas* Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language