cyberspace

noun3

1. •
   A world of information accessed through the Internet.
2. •
   (old-fashioned) The Internet as a whole.

   • If, as we knew with increasing certainty, Russia, China, North Korea, Iran, and others were contesting us in cyberspace, it was time to fight back. — 2020
3. •
   A three-dimensional representation of virtual space in a computer network.