/ Dictionary / Index G grandmamma: Meaning and Definition of Find definitions for: grand•mam•ma Pronunciation: (grand'mu-mä"&wdspcgran'mä"mu, grand'-, gram'-), [key] — n. Informal. grandmother. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grand mal Grandma Moses Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language