FAREWELL interj. 4 definitions
onoun; as, fare you well; and is sometimes used as an expression of separation only; as, farewell the year; farewell, ye sweet groves; that is, I bid you farewell. So farewell hope, and with hope, farewell fear. Milton. Fare thee well! and if forever, Still forever fare thee well. Byron.
BID v.
h, a greeting, a threat, or defiance, etc.; as, to bid one welcome; to bid good morning, farewell, etc. Neither bid him God speed. 2. John 10. He bids defiance to the gaping crowd. Granrille.