ˈdue to BrE AmE preposition
because of something:
The court of inquiry ruled that the crash was due to pilot error.
She has been absent from work due to illness.
The restaurant’s success was due largely to its new manager.
Attendance at the meeting was small, due in part to (=partly because of) the absence of teachers.
REGISTER
Due to is mostly used in formal or official contexts. In everyday English, people usually use because of :
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We cancelled the picnic because of the weather.