1. A country that a person has chosen to live in and become a citizen of, typically after immigrating from their native country
After living in Brazil for ten years, she considers it her adopted country.
Após viver no Brasil por dez anos, ela o considera seu país de adoção.
2. A nation that someone has made their home and integrated into culturally and legally
He became a citizen of his adopted country and fully embraced its culture.
Ele se tornou cidadão de seu país de adoção e abraçou completamente sua cultura.