Within the depth-psychology corpus, ‘gap’ operates across several distinct but interrelated registers. Romanyshyn deploys it most systematically as a structural feature of psychological knowing itself: the gap between soul and the language psychology uses to name it, between what is said and what remains perpetually unsaid, between conscious articulation and unconscious residue. For Romanyshyn, this gap is not a deficiency to be remedied but the very site where genuinely imaginal research takes place — the researcher as border figure standing within it, the Orpheus myth supplying its archetypal grammar. Thompson, approaching from phenomenology and philosophy of mind, employs ‘gap’ in the tradition of Levine’s ‘explanatory gap’: the apparently unbridgeable chasm between third-person physical description and first-person subjective experience. Thompson’s project is to reframe this as a ‘body-body problem’ and move ‘beyond the gap’ through integrated biology and phenomenology. Welwood, drawing on Tibetan Dzogchen, treats the gap between thoughts as a contemplative aperture — the site of pure awareness and potential enlightenment. Cooper locates the gap in the psychoanalytic space between subject and object, self-states, and the oscillation between wholeness and fragmentation. Harris, from an ACT framework, employs the term pragmatically as the ‘reality gap’ between desired and actual circumstances. The term thus marks an aporia that is simultaneously epistemological, ontological, contemplative, and clinical.