good night
US /ˌɡʊd ˈnaɪt/
UK /ˌɡʊd ˈnaɪt/

1.
boa noite
used to express good wishes on parting at night, or when someone is going to bed
:
•
She kissed her children and said, "Good night, sleep tight!"
Ela beijou os filhos e disse: "Boa noite, durmam bem!"
•
He waved and called out, "Good night, everyone!"
Ele acenou e gritou: "Boa noite, a todos!"