best >> /bɛst/
Definition: [noun] That which is the most excellent, outstanding, or desirable.
Example: buy the best you can afford
Definition: [adjective] Of the most excellent, effective, or desirable type or quality.
Example: the best pitcher in the league
Definition: [adverb] To the highest degree; most.
Example: you knew him best
Definition: [transitive verb] Outwit or get the better of (someone)