from wikipedia...
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Definition of "cult" in dictionaries and other points of viewThe Merriam-Webster online dictionary defines cult as:
"a religion regarded as unorthodox or spurious; also : its body of adherents"
Lloyd Eby calls this definition problematic, because:
"...then we must ask: regarded as spurious or unorthodox by whom? Who has or was given this authority to decide what beliefs or practices are orthodox or genuine, and what are unorthodox or spurious? In the realm of religion and belief, one person's or group's norm is another's anathema, and what is regarded as false or counterfeit by one person or group is regarded as genuine and authentic by another." (emphasis added)
This definition is entirely subjective: it means that if you think a religion is unorthodox, then you will call it a cult.Indeed, any religion involving unconditional worship and unquestioning obedience to God could be labelled as a cult (using the pejorative connotation of the word), since such a religion would have that high level of dependency, obedience, and unwavering compliance ascribed to cults by definition. Many mainstream religions still require their members to believe in God unquestioningly, to have faith that he is good and that what he does is good (even in light of problems of theodicy that make it reasonable to question this), to consider one's own wants and needs as unimportant while accepting the will of God as paramount. All of these are certainly characteristics commonly attributed to cults, but while it would not be unreasonable to apply this definition of a cult to any dogmatic religion that requires strict compliance with God's word and will as a condition of membership, the notion of applying the word "cult" to Christianity, Islam, Judaism, or any other major world religion today is considered absurd. There are those (e.g., Maltheists) who make this very claim: that those who worship God fit the classic depiction of cult members in their dogmatism, unswerving obedience, and denial of self. This highlights the problematic nature of defining what is and is not a cult.
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This was amongst some interesting articles on the difference between "cults" and "religions" here:
http://en.wikipedia.org/wiki/Cult