v. 打败，胜过
I always best him at badminton.
打羽毛球我总是赢过他。
Our goal is to best the competition.
我们的目标就是在这场比赛中取胜。
He was bested in the debate.
他在辩论赛中被打败了。

n. 最好的东西，最合乎要求的事物，最重要的优越性
I wish nothing but the best for you, too.
我只希望你能得到最好的一切。

best man 伴郎
You're the best man at my sister's wedding, right?
诶你是我妹妹婚礼上的伴郎是吧？

best seller畅销书，畅销书的作者
I guess this book will be a best seller.
我觉得这本书一定会成为畅销书的。

make the best of it 尽可能的适应坏的情况，在逆境当中尽量承受住
The flood destroyed our house, but we'll make the best of it.
洪水毁了我的家，但是我们会尽力承受住，尽力补救。

the best of both worlds 两全其美
With these delicious but healthy recipes, you can have the best of both worlds.
有了这些美味又健康的食谱呢，就能做到两全其美了。