The production of rapping or knocking sounds, attributed to spirits attempting to communicate, especially on a table during a seance; (also more generally) spiritualism, the practice of attempting to communicate with spirits. Compare "table-turning", "spirit-rapping".
Mid 19th century; earliest use found in Bible & People. From table+ rapping.
That practises or engages in table-rapping.
Mid 19th century. From table+ rapping, after table-rapping.