closed-door

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌclosed-ˈdoor adjective [only before noun]  SECRETclosed-door meetings or talks take place secretly 〔会议或谈话〕秘密的，不公开的

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.

ˌclosed-ˈdoor adjectiveChineseSyllable  

Corpus closed-door place take meetings Business talks secretly or

closed-door
ˌclosed-ˈdoor adjective [only before noun]
closed-door meetings or talks take place secretly