government office; government agency
Formal, somewhat literary term for a government office or agency. In everyday speech, 官庁 (かんちょう) or 役所 (やくしょ) are more common.
That government office is a historic building dating back to the Edo period.
With the relocation of the government agency, traffic in the area increased.
Compound of 官 (government) and 衙 (office). The character 衙 originally referred to a government office or yamen in Chinese, and the compound is a Sino-Japanese word.