grandparent
/ˈɡɹæn(d)pæɹənt/noun
The mother or father of one of your parents.
Example sentences
- “The children spend every other weekend with their grandparents.”
- “My only living grandparent turns ninety next month.”
The everyday plural covers both: 'visiting my grandparents'. Singular 'grandparent' sounds slightly administrative and appears mostly on forms and in research.