overlay
verb [ T ]
uk/ˌəʊvəˈleɪ/ usoverlaying | overlaid | overlaidto cover something with a layer of something else:
Sticky tracing paper overlaid on street maps lets travelers chart their course again and again.
overlay sth with sth By mapping the entire retail landscape and overlaying it with demographic information, the company is able to isolate store-by-store effects of television ad campaigns.
to add information, data, ideas, etc. to existing information:
A computer model overlaid information about age, work experience, and educational attainment.
overlay
noun [ C ]
uk/ˈəʊvəleɪ/ ussomething such as a transparent layer or image that can be put over something else, for example to add information or show a relationship between two things:
The printer is also able to add a watermark or overlay.
information, data, ideas, etc. that are added to existing information:
The phone codes could be changed completely, or by an overlay that adds a second area code.