Definition of "granny"
granny1
/ˈɡɹæni/
adjective
not comparable
(informal) typically or stereotypically old-fashioned, especially in clothing and accessories worn by or associated with elderly women.
verb
third-person singular simple present grannies, present participle grannying, simple past and past participle grannied
(informal, intransitive) To be a grandmother.
(informal, intransitive) To act like a stereotypical grandmother; to fuss.