/ɪˈliːɡəl ˈeɪliən/ – Phrase
Definition: người nước ngoài cư trú trái pháp trên lãnh thổ nước chủ nhà.
A more thorough explanation: “Illegal alien” is a term used in the United States to refer to a foreign national who is residing in the country without legal authorization or permission from the government. This individual may have entered the country unlawfully or may have violated the terms of their legal status.
Example: The court ruled that the defendant was an illegal alien and therefore subject to deportation.