Definition of best adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//best//
    ; NAmE NAmE//best//
    (superlative of good)
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  1. 1  of the most excellent type or quality That's the best movie I've ever seen! He wrote his best songs before he was 25. She was one of the best tennis players of her generation. Is that your best suit? They've been best friends (= closest friends) since they were children. the company’s best-ever results We want the kids to have the best possible education.
  2. 2  most enjoyable; happiest Those were the best years of my life.
  3. 3  most suitable or appropriate What's the best way to cook steak? The best thing to do would be to apologize. He's the best man for the job. It's best if you go now. I'm not in the best position to advise you.
  4. Word OriginOld English betest (adjective), betost, betst (adverb), of Germanic origin; related to Dutch and German best, also to better.Extra examples Owen judged it best to make no reply. This is by far the best restaurant in the town. We aim to give our guests the very best attention. Who in the class is best at history? He’s the best man for the job. I’m not in the best position to advise you. It’s best if you go now. What’s the best way to cook steak?Idioms Idioms containing best adj. are at the entries for the nouns and verbs in the idioms, for example on your best behaviour is at behaviour. 
See the Oxford Advanced American Dictionary entry: best