Definition of "lay down" []

To give up, surrender, or yield (e.g. a weapon), usually by placing it on the ground. (verb)
To intentionally take a fall while riding a motorcycle, in order to prevent a more serious collision. (verb)
To specify, institute, enact, assert firmly, state authoritatively, establish or formulate (rules or policies). (verb)
To stock, store (e.g. wine) for the future. See also lay by. (verb)
To sacrifice, especially in the phrase "to lay down one's life." (verb)

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Use "lay down" in a sentence

"She lay down and thought and worried, and half-dozed the day away."
"Trying to look as smooth as possible, Somber Kitty lay down on his belly and belly-crawled toward her."
"After which, windowless, womanless and cheerless, they lay down on the floor, wrapped their greatcoats about them, used their hats as pillows, and let the gently moving river rock them to sleep."

Words like "lay down"

create lay down the law

make mark

set