This is the 1169th most frequent Russian word.
ваш
"Ваш" means "your" or "yours" (formal or plural).
Here, 'ваш' is used in the possessive form to indicate ownership by a second-person plural or formal singular subject.
Ваш дом очень красивый.
Your house is very beautiful.
Here, 'ваш' is used interrogatively to ask if the object belongs to the addressee formally or plurally.
Это ваш мяч?
Is this your ball?
In this example, 'ваш' is used to identify the choice affiliated with the second-person plural or formal singular subject.