Definition of well adjective from the Oxford Advanced American Dictionary

     

    well

     adjective
    adjective
    NAmE//wɛl//
     
    (better
    NAmE//ˈbɛt̮ər//
     
    , best
    NAmE//bɛst//
     
    )
     
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  1. 1[not usually before noun] in good health I don't feel very well. Is she well enough to travel? Get well soon! (= said when someone is sick) I'm better now, thank you. (informal) He's not a well man.
  2. 2[not before noun] in a good state or position It seems that all is not well at home. All's well that ends well (= used when something has ended happily, even though you thought it might not).
  3. 3[not before noun] (as) well (to do something) sensible; a good idea It would be just as well to call and say we might be late. (formal) It would be well to start early.
  4. Idioms
    all very well (for somebody) (to do something)(informal)
     
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    used to criticize or reject a remark that someone has made, especially when they were trying to make you feel happier about something It's all very well for you to say it doesn't matter, but I've put a lot of work into this and I want it to be a success.
    all well and good(informal)
     
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    quite good, but not exactly what is wanted That's all well and good, but why didn't he call her to say so?
See the Oxford Advanced Learner's Dictionary entry: well