A lien that a judgment creditor is entitled to file against a judgment debtor's property, often in order to sell the property at a sheriff's sale. lien, materialman's. N.See lien, mechanic's. lien, mechanic's. N. A lien that allows builders, tradesmen, suppliers, and others who provide materials or labor for construction or maintenance of buildings to attach the land or buildings in question to secure payment for their work and materials