act of God

US /ˌækt əv ˈɡɑːd/
UK /ˌækt əv ˈɡɑːd/
"act of God" picture
1.

an instance of uncontrollable natural forces in operation (often used in insurance contracts)

:
The damage to the house was caused by an act of God, so the insurance company covered it.
The contract includes a clause for an act of God, excusing performance in such events.