1. A type of science fiction that features or presents characters living in a darkly frightening, futuristic world dominated by computer technology: A type of science fiction in which cyberpunks use computers to govern just about everything.
2. A programmer, or programmers, who break into computer systems in order to steal, to change, or to destroy information as a form of data terrorism: The government investigations discovered cyberpunks that were radicals who employed terror as a political weapon, who usually worked with other terrorists in small cells, and who often used religion as a cover for their terrorist activities.