κεκλεισμένων των θυρών

Etymology
. In genitive plural, from Ancient Greek perfect participle of verb, and

Phrase

 * 1)  behind closed doors, in camera, privately, without audience  (mainly for juries)

Usage notes

 * Phrase used only in genitive plural, without inflection.
 * Polytonic script, before 1982: κεκλεισμένων τῶν θυρῶν