Webster's English Dictionary

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best

1. best \'best\ aj [bme, fr. OE betst; akin to OE bo-t remedy] superlative 
   of GOOD  1: excelling all others  2: most productive of good or of 
   advantage, utility, or satisfaction  3: LARGEST, MOST 
2. best av superlative of WELL  1: in the best way  2: MOST 
3. best n 1: the best state or part  2: one that is best {the ~ falls 
   short}  3: one's maximum effort {do your ~}  4: best clothes 
4. best vt : to get the better of : OUTDO