1. transparent sheets or coverings placed over something
2. additional layers of material applied on top of a base

1. covers or places something on top of another thing
2. adds an additional layer or coating to something

Examples

• The teacher used plastic overlays to show different map features.
• The architect placed overlays on the blueprint to show proposed changes.
• She overlays the cake with chocolate frosting.
• The artist overlays gold leaf onto the painting.
• The presentation includes several transparent overlays for comparison.
• He overlays the wood with a protective varnish.
• The graphic designer overlays text on the background image.