Definition of already adverb from the Oxford Advanced American Dictionary

      

    already

     adverb
    adverb
    NAmE//ɔlˈrɛdi//
     
     
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  1. 1 before now or before a particular time in the past “Lunch?” “No thanks, I've already eaten.” We got there early but Mike had already left. In informal spoken English, you can use the simple past tense with alreadyI already ate. This is not usually considered correct in written English.
  2. 2used to express surprise that something has happened so soon or so early Is it 10 o'clock already? You're not leaving already, are you?
  3. 3used to emphasize that a situation or problem exists I'm already late. There are far too many people already. We can't take any more.
  4. Idioms
    enough already(informal)
     
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    used to say that something is annoying or boring and that you want it to stop
See the Oxford Advanced Learner's Dictionary entry: already