Definition of grandmum in English:
grandmum
noun ˈɡran(d)mʌmˈɡræn(d)ˌməm
British informal One's grandmother.
I came for brunch with my mum and grandmum and they loved it
as name Grandmum wants to see you
Definition of grandmum in US English:
grandmum
nounˈɡran(d)ˌməmˈɡræn(d)ˌməm
British informal One's grandmother.
I came for brunch with my mum and grandmum and they loved it
as name Grandmum wants to see you