Definition and meaning of Establishment Clause: The Establishment Clause of the First Amendment of the United States Constitution states that the government cannot promote or support any religion or religion in general. The Establishment Clause is meant to protect the rights of citizens from being forced to support or adhere to one specific religion, or to be discriminated against for not subscribing to a particular set of religious beliefs. Examples of the Establishment Clause in action include the Supreme Court ruling that public schools cannot require students to say prayers, nor can they organize religious classes or activities. Additionally, the government cannot fund or endorse certain religious events, symbols, or organizations.