behind closed doors

Значение

in private, where the public cannot see or hear

Втайне от посторонних.

Примеры

1. 1The two companies discussed the deal behind closed doors, away from reporters.
2. 2What happens behind closed doors in a marriage is often very different from what friends see.
3. 3The committee made its decision behind closed doors, so nobody knows who voted for what.
4. 4The players were furious that their contracts were negotiated behind closed doors.
5. 5Was the meeting open to parents, or did the governors talk behind closed doors?

Грамматика

Фраза не меняется: doors во множественном числе и без артикля. Обычно стоит после глаголов вроде meet, discuss или happen.