Definitions for "Lay Down"
Keywords:  reveal, fold, throw, dominos, hand
Folding a strong hand in a critical situation.
Folding of a strong hand on the assumption that a stronger hand exists.
to throw in your cards and take no further part in the hand. All bets wagered to that point are lost
A customer who takes the first offer a salesman makes.
A customer who takes whatever deal the salesperson offers.
Keywords:  lie, did, night, drop, rises
A fire is said to "lay down," often at night, when temperatures drop and RH rises. Fires do not "lie down." It's a long-standing term in fire and means that the fire is burning less actively than it did during the day.
Keywords:  enact, institute, establish, laws
institute, enact, or establish; "make laws"