Farewell, goodbye, see you later, so long et cetera.(interjection)
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Use "arrivederci" in a sentence
"The Harvard College Democrats are getting help from an unlikely source in their quest to say "arrivederci" to a Republican control of the White House."
""When I left three years ago, I said it was an 'arrivederci' and not a goodbye because I wanted to return."
"Mario MontiSo arrivederci, Berlusconi, buongiorno, Mario Monti, who has just been made an unelected senator for life, so that he can in fairly short order become prime minister."