0 hidden or kept secret from the public, or without an audience or crowd watching:
1 done in a place where things can be kept secret from the public:
Battles over public budgets are usually fought line by line, behind closed doors as well as in public.
No separate space behind closed doors was necessary.
No longer were the prime minister and the chancellor to conduct economic policy behind closed doors and then bump it through cabinet.
The allocation procedures and practices are thus so complex that professional finance bureaucrats make technical decisions behind closed doors.
The same physiological condition that accounted for the castrato's supposedly enviable position behind closed doors also made him the object of public ridicule.
State violence behind closed doors is one of the most detrimental actions to human flourishing and well-being one can imagine and an insult to justice.
Behind closed doors lie the possibility of pleasure as well as the terror of the unknown; open doors symbolize both promise and loss.
It meets once a month behind closed doors.