—v.on-lā', ôn-), [key]
—n., v., -laid, -lay•ing.
1. an overlay, esp. one in relief.
2. Dentistry.an inlay that restores the occlusal surface of a tooth.
to place or mount (an onlay) on a surface, esp. for decorative purposes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.