Available Definitions:
1) v. i. - A flat tablet or ledge of any material set horizontally at a distance from the floor, to hold objects of use or ornament.
2) v. i. - A sand bank in the sea, or a rock, or ledge of rocks, rendering the water shallow, and dangerous to ships.
3) v. i. - A stratum lying in a very even manner; a flat, projecting layer of rock.
4) v. i. - A piece of timber running the whole length of a vessel inside the timberheads.