Definition of run down phrasal verb from the Oxford Advanced American Dictionary

 

run down

 phrasal verb
phrasal verb
 
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Phrasal Verbs
to lose power or stop working The battery has run down.

run somethingdown

 
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to make something lose power or stop working If you leave your headlights on, you'll soon run down the battery.

    run somebody/somethingdown

     
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  1. 1(of a vehicle or its driver) to hit someone or something and knock them/it to the ground
  2. 2to criticize someone or something in an unkind way He's always running her down in front of other people.
See the Oxford Advanced Learner's Dictionary entry: run down