grandparents
n. countable A1 Beginner US //ˈɡɹændˌpɛɹənts// UK //ɡɹˈændpeəɹənts// grand·par·ents
n. the parents of your mother or father. You use this word to talk about your grandmother and grandfather together.
n. the parents of an individual's mother or father. Plural form of grandparent; used to refer to the maternal and paternal ancestors of the second generation.
I visit my grandparents every Sunday for lunch.
Many children spend their summer holidays at their grandparents' house in the countryside.
The role of grandparents in modern childcare has expanded significantly as more parents work full-time and require reliable family support for their children.
Usage
Almost always used in the plural when referring to the pair; the singular 'grandparent' is used to refer to one individual.