` :More the Dutch word ``sekte`` than the English word cult, but he did use both of the terms. See e.g. here The abortive birth of a destructive cult  by Frans Derks; Jan M. van der Lans Update IX 1 March 1985. He also explained http://hirr.hartsem.edu/ency/cstheory.htm the definition of a cult according to Yinger] in his book ``Volgelingen van de goeroe/Followers of the guru``.  And apart from that I think that Wikipedia should explain jargon. See wikipedia:words to avoid. Almost every person who wrote about NRMs incl. Jan van der Lans first started by explaining the term NRM and comparing it to terms, like sekte or cult.  `