To place in or bring to a particular position; to put or set down (something).
Variations / inflections, depending on the structure and contextual meaning in a sentence.
Also see PUT.
Gloss: /\BOOK/\ MY UNCLE IX1 CL:LAY-DOWN ON-CL:SURFACE.
English equivalent: My uncle lays down the book.
See that there is more than one sign (handshape) for "to lay" or "to lay down"? It's a classifier of the sign LAY-DOWN for a book.
See LAY-DOWN for a regular, base sign (non-classifier).
ASLwrite for LAY-DOWN.