Aliveness occupies a pivotal position across the depth-psychology corpus, functioning simultaneously as a clinical goal, a phenomenological datum, and a marker of ontological authenticity. The term carries at least three distinct registers of meaning that intersect, and occasionally conflict, across the literature. In the somatic-trauma tradition—most prominently represented by Levine and Heller—aliveness designates a psychophysiological state whose presence or absence indexes the degree to which developmental and shock trauma has foreclosed embodied experience. Heller’s NARM framework maps the ‘diminishment of aliveness’ across five adaptive survival styles, treating its restoration as the telos of therapeutic work and locating its oscillation within the autonomic expansion-contraction cycle. Levine anchors aliveness to the engagement of survival instincts and to the somatic quality of muscular tissue. Winnicott, approaching from object-relations theory, grounds aliveness in the ‘body tissues and the working of body-functions,’ identifying it as the substrate of the True Self. Welwood and Epstein import a contemplative register, wherein aliveness names the raw energetic ground uncovered through meditative non-reactivity to emotion—a ‘wide-open aliveness’ prior to discrete feeling-states. The polyvagal lineage (Porges, Dana) treats aliveness implicitly through the ventral vagal state, which furnishes its neurophysiological infrastructure. Across all positions, the suppression of aliveness is linked to freeze, dissociation, and False-Self adaptation, while its recovery signals genuine therapeutic transformation.