/ Dictionary / Index S Sibirʾ: Meaning and Definition of Find definitions for: Si•birء Pronunciation: (syi-byēr'), [key] — n. Russian name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sibilate Sibiu Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language