grandmother grandmother /ˈgrændˌməðɝ/

noun

1. () The mother of your father or mother  ( gran , grannie [British] , nan [Informal, British] , grandma , grandmother , granny [British] , nanna [Informal, British] , grandmama [Archaic] , grandmamma [Archaic] )
   the mother of your father or mother
    My grandmother is an excellent cook
   My grandmother is an excellent cook