What is the french translation of best friend?

The French translation of "best friend" depends on the gender of the person.

For a male best friend:

* Meilleur ami (pronounced meh-YUR ah-mee)

For a female best friend:

* Meilleure amie (pronounced meh-YUR ah-mee)

Both "meilleur" and "meilleure" mean "best," and "ami" and "amie" mean "friend," respectively.