Definition of hamburger noun from the Oxford Advanced American Dictionary

     

    hamburger

     noun
    noun
    NAmE//ˈhæmˌbərɡər//
     
    (also burger)
     
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  1. 1 finely ground beef made into a flat round shape that is then grilled, often served in a roll
  2. 2 (also hamburger meat, ground beef) beef that has been finely ground in a special machine
See the Oxford Advanced Learner's Dictionary entry: hamburger