Definition of First Amendment
Amendment to U.S. Constitution guaranteeing basic freedoms of speech, religion, press, and assembly and the right to petition the government for redress of grievances. The various freedoms and rights protected by the First Amendment have been held applicable to the states through the due process clause of the Fourteenth Amendment.
That's the definition of First Amendment in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.