Definition of roadblock noun from the Oxford Advanced American Dictionary

     

    roadblock

     noun
    noun
    NAmE//ˈroʊdblɑk//
     
     
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  1. 1a barrier put across the road by the police or army so that they can stop and search vehicles The police set up a roadblock on the bridge.
  2. 2something that stops a plan from going ahead
See the Oxford Advanced Learner's Dictionary entry: roadblock