Insisting that he needed to sleep, and almost flattening the little Creevey brothers as they attempted to waylay him at the foot of the stairs, Harry managed to shake everyone off and climb up to the dormitory as fast as he could.
There are no more uses of "waylay" in the book.
Show samples from other sources
I worried that the gang might be waiting outside to waylay me.
She waited near the exit to waylay him and learn more about the event.