Meaning of the word "best friend" in English

What does "best friend" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

best friend

US /ˌbest ˈfrend/
UK /ˌbest ˈfrend/
"best friend" picture

Noun

1.

a person's closest friend

Example:
She told her best friend everything.
He and his best friend have known each other since childhood.
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