Did you know?

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

burst in on - 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/theyburst in on
he/she/itbursts in on
present participlebursting in on
past tenseburst in on
past participleburst in on
  1. burst in on someone/something to suddenly enter a room where someone is doing something

    The headmaster could have burst in on them at any moment.

See also main entry: burst

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