Great-grandmother (noun)

The mother of one's grandparent.

Origin:

Compound of great + grandmother.

Examples:

1. My great-grandmother lived to be 102 years old.
2. I never got to meet my great-grandmother because she passed away before I was born.
3. My mother always talks about how much she loved her great-grandmother.
4. My great-grandmother was a very kind and gentle woman.
5. I have a picture of my great-grandmother hanging on my wall.