1.
chief retainer, senior councillor
The highest-ranking retainer serving a feudal lord (daimyō). The chief retainer managed domain affairs and acted as the lord's primary advisor. A key position in the feudal hierarchy of the Edo period.
Usage
A historical term from the feudal era, particularly the Edo period (1603–1868). Each domain (藩) had several 家老, with the 筆頭家老 (chief senior retainer) being the most powerful. The position was often hereditary.
In modern usage, 家老 appears mainly in historical dramas, novels, and history discussions.