Overlay Definition
 ōvər-lā 
  overlaid, overlaying, overlays
  
    verb
  
 
    overlaid, overlaying, overlays
  
To lay or spread over.
 Webster's New World 
To cover or overspread, as with a decorative layer of something.
 Webster's New World 
To embellish superficially.
 A simple tune that was overlaid with ornate harmonies.
 American Heritage 
To place an overlay upon.
 Webster's New World 
To create (a new area code) having the same boundaries as another.
 In Maryland, area code 240 was overlaid on top of area code 301.
 American Heritage 
    noun
  
 
    overlays
  
Anything laid over another thing; covering.
 Webster's New World 
A decorative layer or the like, applied in overlaying.
 Webster's New World 
A transparent flap showing additional details, areas of color, etc. placed over a map, art work, etc.
 Webster's New World 
The paper affixed to the impression surface of a press to help make a uniform impression.
 Webster's New World 
In betting, odds which are set higher than expected or warranted.
 Webster's New World 
Other Word Forms of Overlay
Noun
Singular:
 overlayPlural:
 overlaysOrigin of Overlay
-  over- +"Ž lay (compare overlie) From Wiktionary 
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