Great-aunt (noun)

The sister of one's grandparent.

Origin:

From great + aunt, meaning "sister of one"s grandparent".

Examples:

1. My great-aunt used to tell me stories when I was a child.
2. She is my mother's great-aunt.
3. I have never met my great-aunt, but I've heard a lot about her.
4. My great-aunt passed away last year.
5. I am going to visit my great-aunt next week.