Definition of “relationship” - Learner’s Dictionary

relationship

noun uk us /rɪˈleɪʃənʃɪp/
BEHAVIOUR [ C ]

B1 the way two people or groups feel and behave towards each other:

He has a very good relationship with his older sister.
ROMANTIC [ C ]

B1 a sexual or romantic friendship:

I don't feel ready for a relationship at the moment.
CONNECTION [ C, U ]

B2 a connection between two or more things:

the relationship between sunburn and skin cancer

(Definition of “relationship” from the Cambridge Learner's Dictionary © Cambridge University Press)