Nostro and Vostro accounts are types of bank accounts.
Nostro Account is an account that a bank holds in another bank. For example, if Bank A (your bank) has an account in Bank B (another bank) that Bank A uses to keep money or make payments, that account is called a Nostro Account.
Vostro Account is an account that another bank holds in your bank. For example, if Bank B (another bank) has an account in Bank A (your bank) that Bank B uses to keep money or make payments, that account is called a Vostro Account.