Overlaying

[verb oh-ver-ley; noun oh-ver-ley] /verb ˌoʊ vərˈleɪ; noun ˈoʊ vərˌleɪ/

verb (used with object), overlaid, overlaying.
1.
to or place (one thing) over or upon another.
2.
to cover, overspread, or surmount with something.
3.
to finish with a or applied decoration of something:
wood richly overlaid with gold.
4.
Printing. to put an overlay upon.
noun
5.
something laid over something else; covering.
6.
a layer or decoration of something applied:
an overlay of gold.
7.
Printing.

8.
a sheet of transparent paper placed over a photograph, a dummy, or other artwork for noting corrections, instructions, mechanical separations, etc.
9.
Computers. software or data in external storage and brought into main storage for execution by replacing or augmenting software or data already there.
10.
a transparent sheet giving special military information not ordinarily shown on maps, used by being placed over the map on which it is based.
11.
a decorative piece of leather or other material stitched on a shoe.
12.
Scot. a cravat.
[oh-ver-ley] /ˌoʊ vərˈleɪ/
verb
1.
simple past tense of .
verb (transitive) (ˌəʊvəˈleɪ) -lays, -laying, -laid
1.
to lay or place something over or upon (something else)
2.
(often foll by with) to cover, overspread, or conceal (with)
3.
(foll by with) to cover (a surface) with an applied decoration: ebony overlaid with silver
4.
to achieve the correct printing pressure all over (a forme or plate) by adding to the appropriate areas of the packing
noun (ˈəʊvəˌleɪ)
5.
something that is laid over something else; covering
6.
an applied decoration or layer, as of gold leaf
7.
a transparent sheet giving extra details to a map or diagram over which it is designed to be placed
8.
(printing) material, such as paper, used to overlay a forme or plate
v.

“to cover the surface of (something),” c.1300, in part from Old English oferlecgan “to place over,” also “to overburden,” and in part from over- + lay (v.). There also was an overlie in Middle English, but it merged into this word. Similar compounds are found in other Germanic languages, e.g. Gothic ufarlagjan. Related: Overlaid; overlaying.
n.

in the printing sense, 1824, from overlay (v.). Meaning “transparent sheet over a map, chart, etc.” is from 1938. In earliest noun use it meant “a necktie” (1725).