Definition of Exactor

In the civil law, a gatherer or receiver of money; a collector of taxes. In old English law, a collector of the public moneys; a tax gatherer. Thus, exactor Regis was the name of the king’s tax collector, who took up the taxes and other debts due the treasury.

That's the definition of Exactor in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.