A wish of happiness or welfare at parting, especially a permanent departure; the parting compliment; a goodbye; adieu. (noun)
parting, valedictory, final(adjective)
To bid farewell or say goodbye(verb)
Examples of word farewell
President Jimmy Carter did it in his farewell address a speech he concluded with the word farewell, which is the proper way to end a farewell address.
Mladic attorney Milos Saljic visited him in his jail cell in the early afternoon and said the former general was crying and very emotional during what he called a farewell visit by his wife and sister.
Their relationship culminates with a very revealing poem that aptly begins with the word farewell.
It was on the 28th of September, 1880, that several of my friends and relatives had gathered in the parlor to have what they called a farewell chat with me while I was yet their girl companion.
He has been publicly girding for his incarceration with a series of goodbyes, including what he called a farewell tour in recent months and a recent Rolling Stone cover story in which he said he considered jail "an experience that I need to have if God's putting me through it."