/ Dictionary / Index G grandson: Meaning and Definition of Find definitions for: grand•son Pronunciation: (gran'sun", grand'-), [key] — n. a son of one's son or daughter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: grandson (Thesaurus) grand slam grandstand Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language