Definition of the First Amendment noun from the Oxford Advanced Learner's Dictionary

 

the First Amendment

 noun
noun
BrE
 
; NAmE
 
[singular]
 
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the statement in the US Constitution that protects freedom of speech and religion and the right to meet in peaceful groups Culture The First Amendment forms part of the Bill of Rights. It is often used by journalists to protect their sources and by the Supreme Court to explain why it cannot restrict offensive communications.
See the Oxford Advanced American Dictionary entry: the First Amendment