Open English Wordnet
Nouns
(n)relationship, human relationshipa 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)“the relationship between mothers and their children”
(n)relationshipa state of connectedness between people (especially an emotional connection)“he didn't want his wife to know of the relationship”
(n)kinship, family relationship, relationship(anthropology) relatedness or connection by blood or marriage or adoption