Breadcrumb Home > Dictionary > Index S Siege Perilous: Meaning and Definition of Find definitions for: Siege' Per'ilous Pronunciation: [key] — Arthurian Romance. Arthurian Romance. a vacant seat at the Round Table that could be filled only by the predestined finder of the Holy Grail and was fatal to pretenders. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. siege mentality siege piece TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: bilious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language