/ Dictionary / Index S Siegbahn: Meaning and Definition of Find definitions for: Sieg•bahn Pronunciation: (sēg'bän), [key] 1886–1978, Swedish physicist: Nobel prize 1924. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. siècle d'or* siege Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language