/ Dictionary / Index S sandcastle: Meaning and Definition of Find definitions for: sand•cas•tle Pronunciation: (sand'kas"ul, -kä"sul), [key] — n. a small castlelike structure made of wet sand, as by children at a beach. a plan or idea with little substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sand-cast sand chair Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language