Definition of peer–to–peer
: relating to, using, or being a network by which computers operated by individuals can share information and resources directly without relying on a dedicated central server (see server 6) In peer-to-peer computing, every client can be a server. You string together two or more computers, and everyone can share files, programs, drives …, printers, and anything else that's attached. — Steve Bass
First Known Use of peer–to–peer
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