8. (Masonry) (a) The horizontal surface of a building stone; as, the upper and lower beds. (b) A course of stone or brick in a wall. (c) The place or material in which a block or brick is laid. (d) The lower surface of a brick, slate, or tile. Knight.
9. (Mech.) The foundation or the more solid and fixed part or framing of a machine; or a part on which something is laid or supported; as, the bed of an engine.