American English

Definition of best adverb from the Oxford Advanced American Dictionary



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  1. 1(superlative of well, often used in adjectives)
  2. 2most; to the greatest extent Which one do you like best? Well-drained soil suits the plant best. her best-known poem
  3. 3in the most excellent way; to the highest standard He works best in the mornings. Hollywood's best-dressed woman The beaches are beautiful, but best of all, there are very few tourists.
  4. 4in the most suitable or appropriate way Painting is best done in daylight. Do what you think best (= what you think is the most suitable thing to do).
  5. Idioms
    as best (as) you can
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    not perfectly but as well as you are able We'll manage as best we can.
    had best (do something)
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    used to tell someone what you think they should do You'd best clear up that mess before Mom gets home.
See the Oxford Advanced Learner's Dictionary entry: best