Legal Definition of Money order: An order for the payment of money, as issued by one post office or bank to another post office or bank. (A person in one city may obtain money from a bank or post office in another city if the bank or post office in the original city issues a money order.) | Looking for a secure and efficient payment method? Discover the legal definition of a money order and its practical applications in today’s financial landscape. Find out how money orders offer security, convenience, and global acceptance for your business transactions. Make informed decisions and ensure peace of mind with this essential financial instrument