TITLE: Applications of forcing in model theory
QUESTION [10 upvotes]: What are the major applications of (set theoretic) forcing in model theory?

REPLY [7 votes]: There is some overload of the word forcing' in these replies.Model theoretic forcing' is a specific technique of Abraham Robinson, named  in analogy with set theoretic forcing, but aimed primarily at least at first towards the construction of existentially closed models.  The name has been used for numerous extensions since. But it should not be confused with applications of set theoretic forcing in model theory.