This is the first family therapy dictionary that goes beyond the scope of a glossary. The authors have struggled for years with the problem. The literature burgeons, the number of family therapists proliferates, and new practitioners want to know more and more about ideas that govern the field. The authors have responded to the demand with a dictionary, which represents the way people under the the terminology. Rather than survey all the involved originators,the authors have used the device of going back to the literature to define the terms the way they were used by the originating writers.