/ Dictionary / Index C Castle Shannon: Meaning and Definition of Find definitions for: Cas'tle Shan'non Pronunciation: [key] a city in SW Pennsylvania. 10,164. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Castlereagh Castle walk Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language