a respectful way to address or refer to an older person

这位老太爷身体还挺硬朗。

a respectful term for one's grandfather or another's father

我的老太爷已经过世多年了。

a respectful or informal title for a district magistrate in imperial China

县太爷正在大堂上审理这桩案子。

noun · the head of the house, as addressed by servants in a traditional household

管家吩咐佣人去给太爷请安。