Behind closed doors
Meaning
Privately or secretly, away from public view.
Usage
Used for confidential meetings or hidden negotiations.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Rooms kept closed to hide activity from outsiders.
Popular in political discourse since the 19th century.