a person who adopts the attitudes, behaviour, dress, etc of the group to which he belongs
2.
a person who complies with the practices of an established church, esp the Church of England
adjective
3.
of a conforming nature or character
Word Origin and History for conformism
n.
1890, "tendency or need to conform" to some group standard, from conform + -ism. In religion, from c.1902. In geology from c.1912. Modern, general sociological sense (social conformism) popularized from c.1948.
conformist
n.
"one who conforms" in any way, originally usually with reference to religion; 1630s, from conform + -ist. Cf. conformism.