/ Dictionary / Index G grandpapa: Meaning and Definition of Find definitions for: grand•pa•pa Pronunciation: (grand'pu-pä"&wdspcgran'pä"pu, grand'-, gram'-), [key] — n. Informal. grandfather. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grandpa grandpappy Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language