noun a layer or stratum.
2. ledge ·noun a shelf, ridge, or reef, of rocks.
3. ledge ·noun a lode; a limited mass of rock bearing valuable mineral.
4. ledge ·noun a piece of timber to support the deck, placed athwartship between beams.
5. ledge ·noun 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.