/ Dictionary / Index S Sifnos: Meaning and Definition of Find definitions for: Sif•nos Pronunciation: (sif'nos, -nôs), [key] — n. Siphnos. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sieyès Sifrei Torah* Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language