n. The act of stooping or bowing.n. In surgery, an operation in cases of cataract, consisting in the removal of the opaque crystalline lens out of the axis of vision by means of a needle: now rarely practised.n. In malting, the spreading of malt to dry after steeping. See couch, transitive verb, 3.n. In paper-making, the removal of the flake of pulp from the mold on which it is formed to a felt.n. A kind of embroidery in which silk, gold thread, or the like is laid upon the surface of the foundation instead of being drawn through it.n. In agriculture, the operation of clearing land from couch-grass.