What is the meaning of Lay_by?

Alternative form of lay-by

To put away for future use; save; to build up as savings.

(of a sailing vessel) To remain stationary while heading into the wind; to come to a standstill; heave to; lay to.

To tend (a crop) for the last time, leaving it to mature without further cultivation.

simple past of lie by

Source: wiktionary.org