Knocked Down (KD) This is a term often referred to in exports and international trade when goods are imported inot a country in unassembled (i.e. in ‘knocked down’) form and then reassembled in that country usually to facilitate packing and shipping as may be the case with large machines, but also to save on import duties as the component parts being imported may attract a lower duty that the assembled item. See also completely knocked down or CKD..