›of the highest quality, to the greatest degree, in the most effective way, or being the most suitable or pleasing; superlative ofgood orwell: He’s one of our best students.Which of the songs did you like best?She was my best friend at school.best bet›Someone’s best bet is the action most likely to be successful: If you want to get to the theater on time, your best bet is to get a cab.Best wishes›Best wishes is a polite way of finishing a letter to someone.