• in the sociological hierarchy leading up to social relation
  Social relation
  In social science, a social relation or social interaction refers to a relationship between two , three or more individuals . Social relations, derived from individual agency, form the basis of the social structure. To this extent social relations are always the basic object of analysis for social...
  
  s, an incidental social interaction between individuals.
• in social network
  Social network
  A social network is a social structure made up of individuals called "nodes", which are tied by one or more specific types of interdependency, such as friendship, kinship, common interest, financial exchange, dislike, sexual relationships, or relationships of beliefs, knowledge or prestige.Social...
  
  s, a node (representing an individual or organization) to which another node is socially connected.

See also

• Forms of activity and interpersonal relations