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

     

    speedster

     noun
    noun
    BrE BrE//ˈspiːdstə(r)//
     
    ; NAmE NAmE//ˈspiːdstər//
     
    (informal)
     
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  1. 1a person who drives a vehicle very fast
  2. 2a machine or vehicle that works well at high speeds
See the Oxford Advanced American Dictionary entry: speedster