/ʌnˈlɔfəl əˈsɛmbli/ – Phrase
Definition: cuộc tụ tập bất hợp pháp.
A more thorough explanation: An unlawful assembly is a gathering of three or more persons with the intent to commit a breach of the peace or to engage in conduct that threatens public safety, peace, or order, and which is in violation of the law.
Example: The police arrested several individuals for participating in an unlawful assembly during the protest.