Final answer:
The Supreme Court has interpreted the establishment clause to mean that the government cannot promote or favor any specific religion or religious beliefs over others, nor can it favor religion over non-religion.
Step-by-step explanation:
The Supreme Court has made several decisions regarding the establishment clause, which is the clause in the First Amendment that says the government may not establish an official religion. The Court's decisions have generally interpreted the establishment clause to mean that the government cannot promote or favor any specific religion or religious beliefs over others, nor can it favor religion over non-religion. This means that the government must treat all religions equally and cannot impose or endorse any particular set of religious beliefs.