0 the father of a person's mother or father:
[ as form of address ] formal or old-fashioned Let me help you, Grandfather.
1 the father of a person’s mother or father
This pen that my grandfather gave me is one of my most treasured possessions.
My grandfather has a profound mistrust of anything new or foreign.
He said that he was going to stick with the traditions established by his grandfather.
Both grandfathers were scientists - in addition to being artists and fishers of men.
The vast majority of the small numbers of male carers mentioned were grandfathers.
The house in which she was born, cared for her parents until they died, and still lives, was built by her grandfather.
