Noun
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a layer of decorative material (such as gold leaf or wood veneer) applied over a surface
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protective covering consisting, for example, of a layer of boards applied to the studs and joists of a building to strengthen it and serve as a foundation for a weatherproof exterior
- overlayer
Verb
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kill by lying on
"The sow overlay her piglets"
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put something on top of something else
"cover the meat with a lot of gravy"