/ Dictionary / Index S Sejm: Meaning and Definition of Find definitions for: Sejm Pronunciation: (sām), [key] — n. the unicameral parliament of Poland. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sejanus Sekhmet 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