Within the depth-psychology and trauma-theory corpus, ‘freezing’ occupies a contested and technically precise position. It is neither simple inaction nor mere passivity, but a biologically organized defensive response — what Ogden, following Misslin, characterizes as ‘alert immobility,’ a highly sympathetically engaged state distinct from the collapsed submission of ‘floppy immobility.’ The concept anchors a spectrum of defensive responses ranging from orienting through fight-flight to freeze and total submission, and its misclassification has generated significant theoretical error: LeDoux pointedly argues that freezing is a behavior, not a feeling, and that conflating freezing behavior with ‘fear’ as a mental state corrupts the entire enterprise of so-called fear-learning research. Levine, working from a somatic and evolutionary framework, treats the chronically unresolved freeze as the central mechanism of traumatic fixation in humans — one that animals naturally discharge through trembling but that humans, burdened by cortical awareness of death, cannot complete. Nijenhuis imports freezing into the structural taxonomy of somatoform dissociation, mapping it onto predatory-imminence stages and correlating it empirically with dissociative disorder caseness. Across these traditions, freezing functions as both a symptom marker and an etiological hinge: the point at which adaptive defense becomes pathological arrest.