Did you know?

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

top 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 [transitive]
Word Forms
present tense
I/you/we/theytop up
he/she/ittops up
present participletopping up
past tensetopped up
past participletopped up
  1. 1
    to completely fill a container that is already partly full

    I’ll just top up the teapot.

    1. a.
      to add more liquid to someone’s glass or cup in order to make it full

      Can I top you up?

      Would you like me to top up your drink?

  2. 2
    to add more to something in order to increase it to the level that you want or need

    a way to top up your earnings

See also main entry: top

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