goodbye

The word "adeus" is the classic way to say goodbye in Portuguese. While it literally translates to "to God" (a-Deus), signifying a final parting or a long separation, it carries a sense of finality and emotional weight. It is the word you use when you are not sure when—or if—you will see someone again. In modern daily life, native speakers often prefer lighter alternatives like "tchau" or "até logo" for everyday farewells. Using "adeus" in a casual setting can sound overly dramatic or even like a permanent breakup, so it is best reserved for moments of genuine departure or deep emotional significance.
In conversation
Final departure at the airport
O avião já vai decolar.
The plane is about to take off.
Então é isso. Adeus, Ana.
So this is it. Goodbye, Ana.
Note the heavy, final tone used here as they may not see each other for a long time.
Breaking up a long-term relationship
Eu não aguento mais essa situação.
I can't stand this situation anymore.
Adeus, Pedro. Não me procure mais.
Goodbye, Pedro. Don't look for me again.
Used here to signal the end of a relationship, emphasizing the permanence of the decision.
Examples
Adeus, meu amor.
Goodbye, my love.
Ele disse adeus antes de viajar para sempre.
He said goodbye before traveling forever.
Não diga adeus, diga apenas até breve.
Don't say goodbye, just say see you soon.