/ Dictionary / Index S siddur*: Meaning and Definition of Find definitions for: sid•dur Pronunciation: (Seph.sē-dr' Ashk. si'd&schwar, si-d&oobrever' Eng. sid'&schwar), [key] — pl. sid•du•rim sid•durs. a Jewish prayer book designed for use chiefly on days other than festivals and holy days; a daily prayer book. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Siddons side Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language