To give up, surrender, or yield (e.g. a weapon), usually by placing it on the ground.
Lay down your arms.
To intentionally take a fall while riding a motorcycle, in order to prevent a more serious collision.
He laid down his brand-new Harley-Davidson to avoid the oncoming bus.
To specify, institute, enact, assert firmly, state authoritatively, establish or formulate (rules or policies).
Let's lay down the rules right at the beginning, so we are consistent.
To stock, store (e.g. wine) for the future. See also lay by.
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.
I feel a bit ill, so I'm going to go lay down for a while.
To draw the lines of a ship's hull at full size, before starting a build.
To assume a reclining position.
Lie down on the bed until you feel better.
To be lazy or remiss.
He never got promoted because he was always lying down on the job.
To submit passively.
I'm not going to lie down and take this!