/ Dictionary / Index S soni-: Meaning and Definition of Find definitions for: soni- Pronunciation: [key] a combining form meaning “sound,” used in the formation of compound words: soniferous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. songwriter Sonia Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language