relationship
noun
rɪˈleɪʃnʃɪp 
rɪˈleɪʃnʃɪp 
1 [countable] the way in which two people, groups or countries behave towards each other or deal with each otherrelationship (between A and B) The relationship between the police and the local community has improved.relationship (with somebody) She has a very close relationship with her sister.I have established a good working relationship with my boss.a master-servant relationship see also love-hate relationship2 [countable] relationship (between A and B)| relationship (with somebody) a loving and/or sexual friendship between two peopleTheir affair did not develop into a lasting relationship.She's had a series of miserable relationships.Are you in a relationship?Money problems have put a strain on their relationship.3 [countable, uncountable] the way in which two or more things are connectedrelationship (between A and B) the relationship between mental and physical healthrelationship (to something) This comment bore no relationship to the subject of our conversation.People alter their voices in relationship to background noise.an inverse relationship4 [countable, uncountable] the way in which a person is related to somebody else in a familya father-son relationshiprelationship between A and B I'm not sure of the exact relationship between them—I think they're cousins.