noun

1. A wish of happiness or safety at parting, especially a permanent departure

2. A departure; the act of leaving

Synonyms: adieu, goodbye

verb

1. To bid farewell or say goodbye.

adjective

1. Parting, valedictory, final.

   “a farewell discourse;  the band's farewell tour”

interjection

1. Goodbye.

   “He said "Farewell!" and left.”