Farewell in French

In French,

Bon Voyage

is said to someone to wish them a good trip. It literally means 'good trip'.

To Say 'Goodbye' , you say:

Au Revoir

or, if you are casually speaking to a friend, for example, you could say:

A bientôt!

Meaning 'See you later!'

or

[fer'wel] (noun) adieu (masculin)

According to a translating dictionary, is the masculine form for 'Farewell'.