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English definition of “speed (sth) up”

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speed (sth) up

verb [I or T, usually + adv/prep] uk phrasal verb with speed   /spiːd/ (sped or speeded, sped or speeded) us  
to happen or move faster, or to make something happen or move faster: This drug may have the effect of speeding up your heart rate. Can the job be speeded up in some way? The tape speeded up towards the end. I think you need to speed up a bit (= drive faster) - we're going to be late. The economy shows signs of speeding up (= increasing activity).
(Definition of speed (sth) up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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