‘主人’ (zhǔ rén) literally combines ‘主’ (zhǔ), meaning ‘master’ or ‘principal,’ and ‘人’ (rén), meaning ‘person.’ Together, it refers to the person who has authority, responsibility, or ownership over something or someone — most commonly a pet, property, or an event. In daily use, it often means ‘pet owner’ (e.g., a dog’s owner) or ‘host’ (e.g., the person welcoming guests at a gathering or home).

The term carries a respectful and slightly formal tone. While it can be used for landlords or owners of businesses, its most frequent and natural usage is in domestic or animal-related contexts — especially when emphasizing care, responsibility, or emotional bond. It is not used for inanimate objects alone (e.g., you wouldn’t say ‘car’s zhǔ rén’); rather, it implies an ongoing relationship of stewardship or hospitality.