/ Dictionary / Index C capstone: Meaning and Definition of Find definitions for: cap•stone Pronunciation: (kap'stōn"), [key] — n. a finishing stone of a structure. the crowning achievement, point, element, or event. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: capstone (Thesaurus) capstan table capsular Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language