/ Dictionary / Index R rook: Meaning and Definition of Find definitions for: rook Pronunciation: (rook), [key] — n. a black, European crow, Corvus frugilegus, noted for its gregarious habits. a sharper at cards or dice; swindler. —v.t. to cheat; fleece; swindle. rook Pronunciation: (rook), [key] — n. Chess. one of two pieces of the same color that may be moved any number of unobstructed squares horizontally or vertically; castle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rook (Thesaurus) rooinek rookery Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language