Origin: Greek suffix -ist
Conformist has 6 different meanings across 2 categories:
someone who conforms to established standards of conduct (especially in religious matters)
Someone who tries to conform to the mainstream.
In English history, a person whose religious practices conformed with the requirements of the Act of Uniformity and who was therefore in concert with the established Church of England, as opposed to those of the Nonconformists, whose practices were not acceptable to the Church of England.
marked by convention and conformity to customs or rules or styles
"underneath the radical image teenagers are surprisingly conformist"
adhering to established customs or doctrines (especially in religion)
Conforming to established customs, etc.