Definitions for abreactionˌæb riˈæk ʃən
Random House Webster's College Dictionary
ab•re•ac•tionˌæb riˈæk ʃən(n.)
the release of emotional tension achieved through recalling a repressed traumatic experience, esp. during psychoanalysis.
Origin of abreaction:
catharsis, katharsis, abreaction(noun)
(psychoanalysis) purging of emotional tensions
The re-living of an experience with a view to purging its emotional dross.
U.S. National Library of Medicine
A process in psychotherapy in which the patient is "desensitized" to emotionally painful, often forgotten (repressed) memories by recalling and reacting to them in the "safety" of the treatment setting.