/ Dictionary / Index G grand piano: Meaning and Definition of Find definitions for: grand' pian'o Pronunciation: [key] a piano having the frame supported horizontally on three legs. Cf. concert grand. See illus. under. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grand penitentiary Grand Prairie Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language