Breadcrumb Home > Dictionary > Index S spp.: Meaning and Definition of Find definitions for: spp. Pronunciation: [key] species (pl. of). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spouting S.P.Q.R. ✖ Related Content Daily Word Quiz: solecism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language