Payment order. An instruction of a sender to a receiving bank, transmitted orally, electronically, or in writing, to pay, or to cause another bank or foreign bank to pay, a fixed or determinable amount of money to a beneficiary if:
(1) The instruction does not state a condition to payment to the beneficiary other than time of payment;
(2) The receiving bank is to be reimbursed by debiting an account of, or otherwise receiving payment from, the sender; and
(3) The instruction is transmitted by the sender directly to the receiving bank or to an agent, funds transfer system, or communication system for transmittal to the receiving bank.
31 CFR § 1010.100
When used in this chapter and in forms prescribed under this chapter, where not otherwise distinctly expressed or manifestly incompatible with the intent thereof, terms shall have the meanings ascribed in this subpart. Terms applicable to a particular type of financial institution or specific part or subpart of this chapter are located in that part or subpart. Terms may have different meanings in different parts or subparts.