Definition of best friend

The exact origin of "best friend" is uncertain, but it likely emerged as a natural evolution of the concept of friendship. While "friend" dates back to Old English, "best" has been used to denote superiority since the 1300s. It's plausible that the phrase arose from the desire to distinguish a particularly close and cherished companion from other friends. Over time, "best friend" became a common and universally recognized term for the deepest and most valued friendship.