Disengagement appears across the depth-psychology corpus in markedly divergent registers, rendering it one of the more semantically plural terms in the library. In clinical and somatic traditions — Polyvagal Theory, Sensorimotor Psychotherapy, Motivational Interviewing, and body-oriented work — disengagement designates a breakdown in relational, somatic, or therapeutic contact: the withdrawal of the client from therapeutic alliance, the body’s exit from interoceptive awareness, or the autonomic nervous system’s collapse into dorsal vagal shutdown. These authors treat disengagement as a diagnostic signal demanding immediate clinical response, most often through re-engagement protocols. A second, psycho-emotional register — visible in emotion researchers such as Lench and in Klinger’s incentive-disengagement cycle as reported by Pargament — casts disengagement as an adaptive function of sadness: the organism’s necessary release from unattainable goals, clearing the field for new investment. A third, mythological-philosophical register emerges in Campbell and Noel, where disengagement names the modern condition of meaning proceeding under the sign of difference rather than identity — Prometheus unbound. Finally, Garland introduces a fourth, neurocognitive reading: metacognitive disengagement from negative appraisal as a mechanism of mindfulness-based emotion regulation. The central tension across all registers is whether disengagement is primarily pathological withdrawal or adaptive release — a question that divides somatic clinicians from emotion theorists.