1. A person who hacks into telephone or other communication systems, often to explore their workings or make free calls
   "The phreak discovered a flaw in the cellular network"

1. To hack into telephone or other communication systems, often to explore their workings or exploit them
   "They phreaked the corporate phone system to eavesdrop on executives"

Derived forms: phreaked, phreaking, phreaks

Encyclopedia: Phreak