Lay is often used where lie is considered standard, as in "I'm going to lay down for a quick nap." The use, which dates to the 14th century, troubled no one until the 18th, but since then, people who care about such things have tried to teach the rest of us that a person lies, not lays, down. Lay in the related use means "to place (someone or something) down gently in a flat position." It requires an object; there must be a thing or person being placed.
Lay it down.
It's time to lay the baby down for a nap.
Lie, on the other hand, does not require an object; instead, the one lying down is already in position or is moving or going to move to such a position on their own.
The cat lies there every morning.
You can lie down on the sofa.
The tenses of the verbs complicate things further. Lay becomes laid and laying
Verb (1)
the train tracks lie just over that hill
I left the book lying on the counter
paparazzi were lying in wait outside the restaurant, a well-known celebrity hangout Verb (2)
would I lie to you about that? Noun (2)
he wanted to deny the accusation, but he couldn't tell a lie
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Verb
Pretti is lying face up on the ground, motionless.—Yahya Abou-Ghazala, CNN Money, 30 Jan. 2026 The answer to that question lies, in part, in the narrative structure, which shifts back and forth between the two women's perspectives.—Declan Gallagher, Entertainment Weekly, 30 Jan. 2026
Noun
The content of the speech was a litany of lies, fantasy and exaggerated claims.—Chicago Tribune, 26 Jan. 2026 But that confidence in ourselves and our capacity was always a lie.—Adam Frank, Forbes.com, 24 Jan. 2026 See All Example Sentences for lie
Word History
Etymology
Verb (1)
Middle English, from Old English licgan; akin to Old High German ligen to lie, Latin lectus bed, Greek lechos