to be or get into a flat position, especially in bed, in order to sleep or rest :
Go and lie down for a while.
He lay down on the sofa and soon fell asleep.
—related noun lie-down
to be or get into a flat position, especially in bed, in order to sleep or rest :
Go and lie down for a while.
He lay down on the sofa and soon fell asleep.
—related noun lie-down
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005