Meaning of “overlay” in the English Dictionary

"overlay" in British English

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overlayverb [ T often passive ]

uk /ˌəʊ.vəˈleɪ/ us /ˌoʊ.vɚˈleɪ/ overlaid, overlaid

to cover something with a layer of something:

The tiny carvings were overlaid with silver.
be overlaid with sth literary

Something that is overlaid with something has a particular quality added to it that influences its character:

Her new novel is overlaid with political concerns.

overlaynoun [ C ]

uk /ˈəʊ.və.leɪ/ us /ˈoʊ.vɚ.leɪ/

(Definition of “overlay” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"overlay" in Business English

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overlayverb [ T ]

uk /ˌəʊvəˈleɪ/ us overlaying, overlaid, overlaid

to 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:

overlaynoun [ C ]

uk /ˈəʊvəleɪ/ us

something 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.

(Definition of “overlay” from the Cambridge Business English Dictionary © Cambridge University Press)