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1.
adjective, superl. of best friend with better as compar.

1. friend of the highest quality , excellence, or standing

2. most advantageous, suitable, or desirable: the best friend.

3. the best part of a day.

Usually used when asked to describe someone amazing in only one word.
Person 1: Use one word to describe Autumn, and only one word!

Person 2:Autumn is the bestfriendicouldeverhave, and yeah that is one word!
by Word Master #381 August 19, 2010