This is the 649th most frequent German word.
beste
"Beste" means "best" in English.
'Beste' is used as the superlative form of 'gut' (good), describing 'Idee' (idea).
Das ist die beste Idee, die ich je gehört habe.
That is the best idea I have ever heard.
'Beste' is used as an attributive adjective describing 'Freundin' (friend) to mean closest or most valued.
Meine beste Freundin wohnt in Berlin.
My best friend lives in Berlin.
'Bestes' is used as a noun form to indicate utmost effort or capability.