Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “speed up (something)”

speed up (something)

verb [I/T] phrasal verb with speed  /spid/ (past tense and past participle sped  /sped/ or speeded) us  
to go or happen faster, or to cause something to happen faster: The car suddenly sped up and went through a red light. He developed a new system to help speed up the work.
(Definition of speed up (something) from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of speed up (something)?
Add Cambridge dictionaries to your browser to your website

Word of the Day


to throw or drop something carelessly

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More