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)
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: state of relatedness or connection by blood or marriage or adoption