only child

US /ˈoʊn.li ˌtʃaɪld/
UK /ˈoʊn.li ˌtʃaɪld/
"only child" picture
1.

figlio unico, figlia unica

a child who has no siblings

:
Being an only child, she sometimes wished for a brother or sister.
Essendo figlia unica, a volte desiderava un fratello o una sorella.
He grew up as an only child in a quiet neighborhood.
È cresciuto come figlio unico in un quartiere tranquillo.