burst in on - definition and synonyms

phrasal verb [transitive]
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