Definition of Freedom of religion
Freedom to individually believe and to practice or exercise one’s belief. In re Elwell, 55 Misc.2d 252, 284 N.Y.S.2d 924, 930. This First Amendment protection embraces the concept of freedom to believe and freedom to act, the first of which is absolute, but the second of which remains subject to regulation for protection of society. Oney v. Oklahoma City, C.C.A. Okl., 120 F.2d 861, 865. Such freedom means not only that civil authorities may not intervene in affairs of church; it also prevents church from exercising its authority through state. Eastern Conference of Original Free Will Baptists of N. C. v. Piner, 267 N.C. 74, 147 S.E.2d 581, 583. See also Establishment clause; Free exercise clause; Liberty (Religious liberty).
That's the definition of Freedom of religion in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.