Definition of payback noun from the Oxford Advanced Learner's Dictionary

     

    payback

     noun
    noun
    BrE BrE//ˈpeɪbæk//
     
    ; NAmE NAmE//ˈpeɪbæk//
     
    [countable, uncountable]
     
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  1. 1the money that you receive back on money that you have invested (especially when this is equal to the amount that you invested to start with); the time that it takes to get your money back a 10-year payback There’s a 25-year payback period, which will discourage most investors.
  2. 2the advantage or reward that somebody receives for something they have done; the act of paying something back His victory was seen as payback for all the hard work he'd put in during training. (informal) It's payback time! (= a person will have to suffer for what they have done)
See the Oxford Advanced American Dictionary entry: payback