This is the 7125th most frequent Russian word.
бочарову
The word "бочарову" does not have an inherent definition; it appears to be a proper noun or a form associated with the surname "Бочаров" in Russian.
In this context, "бочарову" is used in the dative case to indicate the recipient of the action.
Я отправил письмо бочарову.
I sent the letter to Bocharov.
Here, "бочарову" is in the dative case used after the verb "принадлежит" (belongs to) to indicate possession.
Этот дом принадлежит бочарову.
This house belongs to Bocharov.
"Бочарову" again is in the dative case, marking the indirect object of the action; the person receiving the keys.