- a particular system of religious worship,
especially with reference to its rites and ceremonies.
- an instance of great veneration of a person, ideal,
or thing, especially as manifested by a body of admirers:
the physical fitness cult.
- the object of such devotion.
- a group or sect bound together by veneration of the
same thing, person, ideal, etc.
- Sociology . a group having a sacred ideology and a
set of rites centering around their sacred symbols.
To be sure, most organized religions fall under this definition,
but here's the really strange ones. . . :D