Ledge

Part of speech: noun (n.)

1. 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.

2. A shelf, ridge, or reef, of rocks.

3. A layer or stratum. The lowest ledge or row should be of stone. Sir H. Wotton.

4. A lode; a limited mass of rock bearing valuable mineral.

5. A piece of timber to support the deck, placed athwartship between beams.