Overlay may refer to:
- Overlay architecture, "event architecture" relating to the temporary elements that supplement existing buildings and infrastructure to enable the operation of major sporting events or festivals.
- Overlay Control in semiconductor manufacturing, for monitoring layer-to-layer alignment on multi-layer device structures.
- Video overlay, techniques to display video on computer display.
- Historic overlay district, a zoning district that applies special rules to a portion of other districts, usually for historic or conservation reasons.
- Overlay plan, a method of introducing new area codes in telephony
- In gambling, an overlay is where the bettor thinks the odds given are too generous
Read more about Overlay: In Computer Tech