noun.the way in which two or more things or people are connected: the state of being related or interrelated

• the relationship between physical and mental health
• studied the relationship between the variables

noun.the way in which two or more people, groups, countries, etc., talk to, behave toward, and deal with each other

• the doctor-patient relationship
• had a good relationship with his family

noun.one's feelings or behavior towards something that one deals with regularly

• The relationship between the two countries has improved.
• She and her brother have a close relationship.