Definition of grandparenting in US English:

grandparenting

noun

  • The activity of participating in the upbringing of a child as a grandparent.

    ‘grandparenting is a happy reprise for many active retirees’
    as modifier ‘grandparenting duties’

Pronunciation

grandparenting

/ˈɡran(d)ˌperəntiNG//ˈɡræn(d)ˌpɛrəntɪŋ/