/ Dictionary / Index S SPDA: Meaning and Definition of Find definitions for: SPDA Pronunciation: [key] single-premium deferred annuity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. S.P.C.C. speak Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language