best friend

1. 1.

   the one friend who is closest to you

   Broaderfriend

Questions about best friend

What does best friend mean?

best friend means "the one friend who is closest to you".

Is best friend a common word?

best friend is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.