Lone Coward Posted in L Best definition Lone Coward A person, often mentally unstable, who acting alone commits a violent or terrorist like act. Did you hear about that guy who killed the soldier on Parliament Hill? Yeah, what a Lone Coward! How satisfied are you with the definition? Looking for Lone Coward meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 12 times.