Definition of ahead of preposition from the Oxford Advanced Learner's Dictionary

     

    ahead of

     preposition
    preposition
    BrE
     
    ; NAmE
     
     
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  1. 1further forward in space or time than somebody/something; in front of somebody/something Two boys were ahead of us. Ahead of us lay ten days of intensive training.
  2. 2earlier than somebody/something I finished several days ahead of the deadline.
  3. 3further advanced than somebody/something; in front of somebody, for example in a race or competition She was always well ahead of the rest of the class. His ideas were way ahead of their time (= very new and so not widely understood or accepted).
See the Oxford Advanced American Dictionary entry: ahead of