Check out this headline from The Guardian. Why is Brexit described as 'the elephant in the room' ?

What does this idiom mean?[Audio][Image]

Question

Check out this headline from The Guardian. Why is Brexit described as 'the elephant in the room' ?

What does this idiom mean?[Audio][Image]

Answer

The idiom "Elephant in the room" in this case is describing Brexit as a controversial issue but it is avoided being discussed or acknowledged.