From Longman Dictionary of Contemporary Englishclosed-doorˌclosed-ˈdoor adjective [only before noun] SECRETclosed-door meetings or talks take place secretly
Examples from the Corpus
closed-door• Leaders gather in closed-door cabals and carry on regardless of what their citizens think.• With the auction system, gone for ever will be the closed-door deals with local politicos.• There have been enough closed-door meetings around here lately.• But closed-door negotiations have yielded little more than words.• All four dissenters spoke in the closed-door party session.• He devoted most of his remarks in the closed-door session to offering his version of events in the ethics case against him.• When Fisher got back she called Fontaine for a closed-door session.From Longman Business Dictionaryclosed-doorˌclosed-ˈdoor adjective [only before a noun] closed-door meetings, talks etc take place privately and are not open to members of the publicTop business leaders had a closed-door meeting with the Prime Minister.The Senate held a closed-door session. 