Cultism is the system or practice of a group of people known as Cult with a religious, philosophical or cultural identity sometimes viewed as Sect, often existing on the margin of society or exploitative towards its members. The members of this group are usually described as Cultists. There activities are being carried out at odd hours of the day and are limited only to the knowledge of their members.

Cultism are being characterized by membership not open to the general public and members meet secretly. Also member have what is called "Sign language" either by the way they greet, their mode of dressing or what colour they put on. They have Grand Master who they worship and pay allegiance to all the time.
They swear an "oaths of secrecy" meaning that members should not disclose what they do to non-members. Most of their members are ignorant of the true intentions of their leaders. Age is never a barrier provided you are willing i.e young, middle-aged or old people belongs to different cult groups of their choice. Sometimes, members are initiated by force.

However, cultism is one the social issues and problems that demands immediate attention so as to protect the values and lives of people and our society in general.

for more information on this...go to http://www.familygists.com/2017/02/cultism-1-definition-of-cultism.html