apologise · verb I /əˈpɒl.ə.dʒaɪz/Full view
apologise
B1 to tell someone that you are sorry about something you have done
Dictionary examples:

I must apologise to Isobel for my behaviour.

Trains may be subject to delay - we apologise for any inconvenience caused.

She apologised for having to leave early.

Learner example:

I'm writing to apologise because I won't be at tomorro[w]'s class. (Preliminary English Test; B1; Spanish)

Cambridge logo