overlay
noun/ˈəʊvəleɪ/
/ˈəʊvərleɪ/
- a clear sheet with drawings, figures, etc. on it that can be placed on top of another sheet in order to change it
- An overlay showing population can be placed on top of the map.
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- a thing that is laid on top of or covers something else
- an overlay of fibreglass insulation
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overlay