relationship

(noun) a relation between people; (`relationship' is often used where `relation' would serve, as in `the relationship between inflation and unemployment', but the preferred usage of `relationship' is for human relations or states of relatedness). Synonyms: human relationship. Example: "The relationship between mothers and their children."

(noun) a state of connectedness between people (especially an emotional connection). Example: "He didn't want his wife to know of the relationship."

(noun) a state involving mutual dealings between people or parties or countries.

(noun) (anthropology) relatedness or connection by blood or marriage or adoption. Synonyms: kinship, family relationship.