grownchild
nounUK /ˈɡrəʊn.tʃaɪld/
US /ˈɡroʊn.tʃaɪld/
A grownchild is a person's son or daughter who is now an adult.
Her grownchild lives in another city and calls every Sunday.
OTHER MEANINGS
2. An adult son or daughter considered in relation to their parents' household.
The grownchild moved back home to save money.
3. A person who has reached legal adulthood but remains someone's child.
As a grownchild, he still asks his mother for advice.
4. An adult descendant in a family tree.
The family reunion included every grownchild and grandchild.