/ɪˈliːɡəl ˈɪmɪɡrənt/ – Phrase
Definition: Người nhập cư bất hợp pháp.
A more thorough explanation: a person who has entered a different country illegally to live there permanently, and who has no legal right to be there
Example: The number of illegal immigrants arrested at the Port of Dover has almost doubled in two years.