What is the meaning of 'best friend'?

Answer 1

In German, "best friend" would mean either "bester Freund" or "bester Freundin."

A person may have many friends, but there will usually be one who is preferred among the rest, either male or female. This may be a friend you have talked with more, who knows more about you, and whom you know more about.

A best friend is one you feel you can rely on to help you more than others, and one whom you would be more likely to help, in times of need.

Answer 2

Best friend is always their for you and help you in trouble