0 a lock that is inside the edge of a door, so that it cannot be seen or removed when the door is closed -- （嵌入门里的）插锁，嵌锁
Furthermore, a mortise lock typically accepts a wide range of other manufacturers' cylinders and accessories, allowing architectural conformity with lock hardware already on site.
The installation of a mortise lock can not generally be undertaken by the average homeowner since it is labor-intensive and requires a working knowledge of basic woodworking tools and methods.
