Lien. Lien means any interest in, or power over, real or personal property, reserved by the vendor, or created by the parties or by operation of law, chiefly or solely for the purpose of assuring the payment of the purchase price, or a debt, and irrespective of the identity of the party in whom title to the property is vested, including but not limited to mortgages, deeds with a defeasance therein or collaterally, deeds of trust, security deeds, mechanics' liens, lease-purchase contracts, conditional sales contracts, consignments.
38 CFR § 36.4301
Whenever used in 38 U.S.C. chapter 37 or subpart F of this part, unless the context otherwise requires, the terms defined in this section shall have the following meaning: