An entity which is part of, and participates in, a larger social group or society.

plural of social democracy

Interactive forms of media that allow users to interact with and publish to each other, generally by means of the Internet.

plural of social class

(collective, sociology) A network of personal or business contacts, especially as facilitated by social networking on the Internet.

(sociology) The study of interactions within and between societies.

Someone who only smokes with other people who are smoking.

Someone who only drinks alcohol when with acquaintances who are drinking.

(uncountable) Shared or interactive trade in financial goods and services, through primarily online means. / (uncountable) Online financial trading conducted by means of a social network.

plural of social worker