What does "grandparent" mean?

The parent of someone's parent.

What is a synonym for "grandparent"?

Common synonyms include: ancestor, grandfather, parent, progenitor, relative.

Pronounced //ˈɡɹæn(d)pɛəɹənt//.

//ˈɡɹæn(d)pɛəɹənt// noun, verb

noun, verb ·Uncommon ·Advanced level

Noun

1
The parent of someone's parent.
"A 15-year-old orphan is being forced from the Arizona senior community where he lives with his grandparents after the homeowner’s association said it could face legal issues if he stayed."
2
a parent of your father or mother wordnet