What is the meaning of Lay_down?

To give up, surrender, or yield (e.g. a weapon), usually by placing it on the ground.

To place on the ground, e.g. a railway on a trackbed.

To intentionally take a fall while riding a motorcycle, in order to prevent a more serious collision.

To specify, institute, enact, assert firmly, state authoritatively, establish or formulate (rules or policies).

To stock, store (e.g. wine) for the future. See also lay by.

To kill (someone).

To euthanize an animal.

To sacrifice, especially in the phrase "to lay down one's life."

To lie down; to place oneself in a reclined or horizontal position, on a bed or similar, for the purpose of resting.

To draw the lines of a ship's hull at full size, before starting a build.

To place a sheet in a printing press for printing.

simple past of lie down

Source: wiktionary.org