1. Of a social network of equal partners able to conduct business without using a middle man
   "The P2P lending platform connects borrowers directly with individual lenders";
   - peer-to-peer
    
2. (computing) Of a network of two or more computers connected as equal partners and able to share processing, control and access to data and peripherals
   "The P2P system allowed for decentralized data transfer";
   - peer-to-peer

Encyclopedia: P2P