Meaning of “because of” - Learner’s Dictionary

because of

preposition us uk /bɪˈkɒzəv, bɪˈkəzəv/
Unfortunately I couldn't go because of illness.It was impossible to sleep because of the noise.We were delayed because of the rail strike.Meetings for next week have been cancelled because of the conference.Flights to the region have been cancelled because of the trouble.

B1 as a result of someone or something:

We got into all this trouble because of you.

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