behind closed doors

The weigh-in took place behind closed doors in London.

There are so many factors that go on behind closed doors, but whichever way the coaches decide to go, it will give New Zealand problems.

Ex-Scotland and Arsenal defender Jen Beattie added that there were "really difficult times" in team environments but they are "better left behind closed doors".

Still, deteriorating housing affordability is already a major political issue—one that will inevitably influence discussions around monetary policy behind closed doors.

The hearing then continued behind closed doors at the prosecution's request.