any relationship between two or more individuals
A social interaction or social relation is the way people talk and act with each other. It may include interactions in a team, family or bureaucracy. It includes any relationship between two or more individuals. It is a source of socialization and it characterizes all types of social relationships.
According to Gish and N.P, " Social interaction is the reciprocal influence human beings exert on each other through inter stimulation and response."