American English

Definition of speed up phrasal verb from the Oxford Advanced American Dictionary

  

speed up

 phrasal verb
phrasal verb
 
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Phrasal Verbs

speed up

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speed somethingup

 
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 to move or happen faster; to make something move or happen faster The train soon speeded up. Can you try and speed things up a bit? They have speeded up production of the new car.
See the Oxford Advanced Learner's Dictionary entry: speed up