Social Networking Definition

noun

Open, Web-based networking in which users are able to informally share, variously, messages, videos, digital photographs, etc.

Webster's New World

Using social contacts to network.

Wiktionary

(Internet, business) The use of Internet communities to network and communicate using shared interests, related skills, or geographical location between consumers and businesses.

Wiktionary

The interaction between a group of people who share a common interest.

Wiktionary

A web interface that allows users to post ideas and interact. Groups and relationships of complete strangers may be formed by various means such as interests or mutual friends.

Wiktionary