(bound form) yellow-painted palace gate; specifically the gate to the inner chambers of the imperial palace

eunuch; derived from the official titles for palace attendants during the Han Dynasty who were typically eunuchs

(literary) shorthand for an imperial government department responsible for reviewing edicts, such as the 门下省 mén​xià​shěng or 黄门省 huáng​mén​shěng

(literary) shorthand for the official title 黄门侍郎 huáng​mén​shì​láng, an attendant within the imperial palace