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