Definition of codependency noun from the Oxford Advanced Learner's Dictionary

 

codependency

 noun
noun
BrE BrE//ˌkəʊdɪˈpendənsi//
 
; NAmE NAmE//koʊdɪˈpendənsi//
 
[uncountable](psychology)
 
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a situation in which two people have a close relationship in which they rely too much on each other emotionally, especially when one person is caring for the other one
See the Oxford Advanced American Dictionary entry: codependency