The term "Leaseback" or "Leaseback sale" refers to a transaction in which the seller leases the property back from the new owner immediately after the sale. The purpose of a leaseback can vary, but it is typically an incentive the seller offers the buyer allowing them to buy the new home and avoid having the pay the mortgage for the first few months to a year or more.

Bankapedia's Take

Leaseback's seem to grow in popularity during a declining market, when selling homes can prove difficult. If an investor is buying multiple homes at or around the same time a leaseback allows them to remain liquid in order to accumulate additional properties.

The term Leaseback is often called "sale and leaseback".