grandma /ˈɡɹænmɑː/noun 2verb 2forms 4 noun2 •(informal) a grandmother, the mother of one of someone's parents •(informal) Any elderly woman, regardless of if she has grandchildren. verb2 •(informal, rare) To be or act as a grandmother to (someone).“I don’t want you to be a grandma.” / But why, I wondered, worried that he perceived some defect in my grandma-ing ability. Doesn’t he think I’ll be a good grandma? — 2006 •(informal, rare) To address (someone) as “grandma”.“But Grandma—,” I said. […] “And don’t you go ‘Grandma-ing’ me neither,” she said. — 2003 formsgrandmaed · grandma-ing · grandmaing · grandmas