Loss and Damage (L&D) has been the subject of contentious debate in international climate policy for several decades. Recently, formal mechanisms on L&D have been established, but arguably through unclear language. This ambiguity is politically important, but researchers and practitioners require clearer understandings of L&D. Here we report on the first in-depth empirical study of actor perspectives, including interviews with 38 key stakeholders in research, practice, and policy. We find points of agreement and also important distinctions in terms of: the relationship between L&D and adaptation, the emphasis on avoiding versus addressing L&D, the relevance of anthropogenic climate change, and the role of justice. A typology of four perspectives is identified, with different implications for research priorities and actions to address L&D. This typology enables improved understanding of existing perspectives and so has potential to facilitate more transparent discussion of the options available to address L&D. prevent, avoid, proactive, reducing and reversing L&D, reducing and minimising, averting and reducing, minimising risks, potential L&D, potential impact, L&D is under adaptation, humanitarian response, unfortunate Risk Management climate risk management, comprehensive climate management, holistic, total risk, risk layering, high level losses, changing risk profile, evolving risk, socioeconomic thresholds, extreme events,