Definition of overdrive noun from the Oxford Advanced American Dictionary

 

overdrive

 noun
noun
NAmE//ˈoʊvərˌdraɪv//
 
[uncountable]
 
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  • an extra high gear in a vehicle, that you use when you are driving at high speeds to be in overdrive
  • Idioms
    go into overdrive
     
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    to start being very active and working very hard As the wedding approached, the whole family went into overdrive.
    See the Oxford Advanced Learner's Dictionary entry: overdrive