The term ‘Adult Child’ occupies a distinctive position within the depth-psychology and recovery corpus, functioning simultaneously as a clinical descriptor, a phenomenological self-designation, and a therapeutic framework. Originating within the Adult Children of Alcoholics fellowship — traceable to Alateen offshoots of the late 1970s and the foundational work of Tony A. — the term names an adult whose present-day decisions, relational patterns, and emotional responses remain governed by survival strategies formed in a dysfunctional or alcoholic childhood. It is not a diagnosis of arrested development or infantilism; rather, as the ACA literature is at pains to emphasize, it identifies the persistence of childhood adaptive mechanisms — hypervigilance, compulsive responsibility, denial, fear of abandonment — within an adult personality that has never received the corrective experience necessary to supersede them. The concept spans beyond its alcoholic-family origins to encompass any home defined by shame, neglect, emotional abuse, or parental dysfunction. Clinically, the adult child condition is theorized as a form of complex trauma, with PTSD mechanisms, the divided self, and the dissociated Inner Child all functioning as explanatory constructs. The literature’s therapeutic arc moves from identification through the Laundry List traits, to reparenting via a Loving Parent within, toward integration of the Inner Child and genuine self-worth. Tension exists between the recovery-fellowship model and clinical depth psychology, though the two converge on the centrality of early wounding, the body as mnemonic of trauma, and the necessity of reconnecting with an authentic interior life.