/ˈfɛdərəl ˈɔfɛns/ – Phrase
Definition: (Mỹ) hành vi phạm tội theo luật hình sự liên bang, hành vi phạm tội liên bang.
A more throughout explanation: A federal offense refers to a crime that is in violation of United States federal laws, as opposed to state or local laws. These offenses are prosecuted in federal courts and are typically crimes that involve actions that are considered to be against the interests of the federal government or that cross state lines.
Example: Committing tax evasion is considered a federal offence in the United States.