This is the 8345th most frequent Russian word.
мишина
"Мишина" is a Russian surname and does not have a direct definition; it is derived from the name "Миша" (Misha), a diminutive form of Михаил (Mikhail).
Here, 'Мишина' functions as a possessive form, indicating that the car belongs to Misha.
Мишина машина стоит у дома.
Misha's car is parked near the house.
In this sentence, 'Мишина' is used to refer to Misha's possession or responsibility regarding an idea.
Это была идея Мишина.
It was Misha's idea.
Here, 'Мишиным' (instrumental case of 'Мишин') indicates Misha as the doer or author of the story.