public enemy

WordReference Random House Unabridged Dictionary of American English © 2025

pub′lic en′emy, 

1. a person or thing considered a danger or menace to the public, esp. a wanted criminal widely sought by the F.B.I. and local police forces.
2. Government a nation or government with which one's own is at war.
• 1750–60

Collins Concise English Dictionary © HarperCollins Publishers::

public enemy noun

1. a notorious person, such as a criminal, who is regarded as a menace to the public