Did you know?

Click any word in a definition or example to find the entry for that word

speed up - definition and synonyms

What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

Thesaurus diagram

The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

phrasal verb
Word Forms
present tense
I/you/we/theyspeed up
he/she/itspeeds up
present participlespeeding up
past tensesped up or speeded up
past participlesped up or speeded up
Related words
  1. 1
    [intransitive] to move or happen faster

    You see drivers speeding up when they should be slowing down.

  2. 2
    [transitive] to make something move or happen faster
    speed things up:

    We’re hoping the changes will help speed things up.

See also main entry: speed

deep learning

a form of machine learning which incorporates the use of neural networks

BuzzWord Article

Open Dictionary

snap election

a general election … that is called earlier than expected

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog
Macmillan learn live love play