cult (n.) Look up cult at Dictionary.com
1610s, "worship," also "a particular form of worship," from French culte (17c.), from Latin cultus "care, labor; cultivation, culture; worship, reverence," originally "tended, cultivated," past participle of colere "to till" (see colony). Rare after 17c.; revived mid-19c. with reference to ancient or primitive rituals. Meaning "devotion to a person or thing" is from 1829.
Cult. An organized group of people, religious or not, with whom you disagree. [Rawson]