This is the 6368th most frequent Russian word.
хозяйка
"Хозяйка" means "hostess" or "female owner."
In this context, "хозяйка" refers to a female house owner or the person in charge of hosting in a home setting.
Хозяйка дома угостила нас чаем.
The hostess of the house treated us to tea.
Here, "хозяйка" means the female owner or caretaker of the cat.
Кошка смотрела на свою любовную хозяйку, мурлыча.
The cat looked at her lovely mistress, purring.
In this sentence, "хозяйка" denotes a female manager or proprietor of a farm or estate.