noun
ambassador's official residence
Refers specifically to the official residence provided for an ambassador, distinct from the embassy chancery (大使館).
大使公邸で晩餐会が開かれた。
A dinner party was held at the ambassador's official residence.
大使館 is the embassy office (chancery), while 大使公邸 is the ambassador's personal official residence.
Compound of 大使 (ambassador) and 公邸 (official residence).