Meaning of “sidetrack” - Learner’s Dictionary

sidetrack

verb [ T ] uk us /ˈsaɪdtræk/

to make someone forget what they were doing or speaking about and start doing or speaking about something different:

[ often passive ] Sorry, I was talking about staffing and I got sidetracked.

(Definition of “sidetrack” from the Cambridge Learner’s Dictionary © Cambridge University Press)