/ Dictionary / Index S S.P.Q.R.: Meaning and Definition of Find definitions for: S.P.Q.R. Pronunciation: [key] the Senate and People of Rome. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spp. S.P.R. 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