A ledge is a narrow platform or edge that protrudes from a wall. You can find ledges on cliffs, buildings, and even furniture.
When we talk about ledges in everyday life, we often think of them as horizontal surfaces that are connected to walls. For example, if you have a bookshelf with a flat top that sticks out from the back wall, that's a shelf or ledge for your books. If you're on a hike and find a narrow walkway along a cliff face, that might be a natural rock ledge. Some people even use the word to describe the edge of a table or countertop where you can place things like vases or decorative objects.
A shelf on which articles may be laid; also, that which resembles such a shelf in form or use, as a projecting ridge or part, or a molding or edge in joinery.
To cause to have, or to develop, a ledge (during mining, canal construction, building, etc).
