noun, often attributive
Definition of cult
1 : a religion regarded as unorthodox or spurious. (Evangelism)
2a : great devotion to a person, idea, object, movement, or work (Trump,fascism,KKK,Neo-Nazi)
b : the object of such devotion
c : a usually small group of people characterized by such devotion (MAGA, ProudBoys)
3 : a system of religious beliefs and ritual.
4 : formal religious veneration.
5 : a system for the cure of disease based on dogma set forth by its promulgator health cults
Here is a very comprehensive list of cult attributes.