Definition of enough adverb from the Oxford Advanced Learner's Dictionary

      

    enough

     adverb
    adverb
    BrE BrE//ɪˈnʌf//
     
    ; NAmE NAmE//ɪˈnʌf//
     
    (used after verbs, adjectives and adverbs)
     
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  1. 1  to the necessary degree I hadn't trained enough for the game. This house isn't big enough for us. She's old enough to decide for herself. We didn't leave early enough. Tell them it's just not good enough.
  2. 2  to an acceptable degree, but not to a very great degree He seemed pleasant enough to me.
  3. 3  to a degree that you do not wish to get any greater I hope my job's safe. Life is hard enough as it is.
  4. Word Origin Old English genōg, of Germanic origin; related to Dutch genoeg and German genug.Idioms
    be man enough (to do something/for something)
     
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    to be strong or brave enough He was not man enough to face up to his responsibility.
    curiously, funnily, oddly, strangely, etc. enough
     
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    used to show that something is surprising Funnily enough, I said the same thing myself only yesterday.
    (informal, especially British English) used to say that an idea or suggestion seems reasonable ‘We'll meet at 8.’ ‘Fair enough.’ If you don't want to come, fair enough, but let Bill know. (used in questions and negative sentences) to achieve all that is wanted The new legislation is welcome but does not go far enough. Do these measures go far enough? (disapproving) Stop it now. The joke has gone far enough (= it has continued too long).
    (as) like as not, like enough, most/very like
     
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    (old-fashioned) quite probably She would be in bed by now, as like as not.
    (British English, informal) used to say that something is so nearly true that the difference does not matter We've been here twenty years, near enough. (informal) certainly; in a way that cannot be denied You heard me right enough (= so don't pretend that you did not). used to say that something happened as expected I said he'd forget, and sure enough he did. ‘Stop,’ she said, ‘I can hear something.’ Sure enough, in the distance we could hear the sound of a car approaching.
See the Oxford Advanced American Dictionary entry: enough