ledging

noun

1. a relatively narrow, projecting part, as a horizontal, shelflike projection on a wall or a raised edge on a tray.
2. a more or less flat shelf of rock protruding from a cliff or slope.
3. a reef, ridge, or line of rocks in the sea or other body of water.
4. Mining.
   1. a layer or mass of rock underground.
   2. a lode or vein.
5. Carpentry. a member similar to but larger than a cleat.
6. Shipbuilding. a minor transverse deck beam running between regular deck beams to form part of a coaming.

verb (used with object), ledged, ledg·ing.

7. to assemble (a door or the like) with ledges.

noun

1. a narrow horizontal surface resembling a shelf and projecting from a wall, window, etc
2. a layer of rock that contains an ore; vein
3. a ridge of rock that lies beneath the surface of the sea
4. a narrow shelflike rock projection on a cliff or mountain

n.late 13c., “crossbar on a door,” perhaps from Middle English verb leggen “to place, lay” (see lay (v.)). Sense of “narrow shelf” is first recorded 1550s; “shelf-like projection of rock” is from 1550s.