What is best friend definition?

A best friend is someone who knows you inside and out and accepts you for who you are. They are always there for you through thick and thin and provide unconditional love and support. A best friend can be someone you've known for a long time or someone who you've just met, but the connection is instant and strong. They are someone who you can confide in, laugh with, and make memories with. A best friend is the person who you can rely on to pick up the phone in the middle of the night when you need them most. Their friendship is something truly special and can last a lifetime.