Complex dissolution names a contested and multivalent movement within depth psychology: the loosening, disintegration, or deliberate dismantling of a psychic complex so that its bound energy may be freed for wider integration. The corpus reveals at least three distinct registers in which the term operates. In the Freudian register, dissolution is most canonically theorized as the fate of the Oedipus complex, where the threat of castration compels the relinquishment of incestuous object-cathexes and their transformation into identificatory structures — a process Freud treats as foundational to character formation and conscience. In the Jungian and post-Jungian registers, dissolution is simultaneously a danger and a necessity: the ego-complex must soften its rigid boundaries to permit unconscious contents to be assimilated, yet an insufficiently structured ego risks pathological fragmentation or schizophrenic dissolution. The alchemical tradition, strongly absorbed by Jung and his commentators, figures dissolution through the image of solutio — the nigredo-stage in which fixed matter is returned to prima materia before re-coagulation. A fourth, phenomenological register appears in shamanic and altered-states research, where ego-dissolution is measurable, correlating with peak experiences of self-transcendence. The term thus sits at the intersection of developmental theory, clinical psychopathology, alchemical symbolism, and transpersonal experience — a convergence that gives it unusual explanatory range and ongoing theoretical tension.