Background: Building palliative care capacity among all healthcare practitioners caring for patients with chronic illnesses, who do not work in specialist palliative care services (non-specialist palliative care), is fundamental in providing more responsive and sustainable palliative care. Varying terminology such as ‘generalist’, ‘basic’ and ‘a palliative approach’ are used to describe this care but do not necessarily mean the same thing. Internationally, there are also variations between levels of palliative care which means that non-specialist palliative care may be applied inconsistently in practice because of this. Thus, a systematic exploration of the concept of non-specialist palliative care is warranted. Aim: To advance conceptual, theoretical and operational understandings of and clarity around the concept of non-specialist palliative care. Design: The principle-based method of concept analysis, from the perspective of four overarching principles, such as epistemological, pragmatic, logical and linguistic, were used to analyse non-specialist palliative care. Data sources: The databases of CINAHL, PubMed, PsycINFO, The Cochrane Library and Embase were searched. Additional searches of grey literature databases, key text books, national palliative care policies and websites of chronic illness and palliative care organisations were also undertaken. Conclusion: Essential attributes of non-specialist palliative care were identified but were generally poorly measured and understood in practice. This concept is strongly associated with quality of life, holism and patient-centred care, and there was blurring of roles and boundaries particularly with specialist palliative care. Non-specialist palliative care is conceptually immature, presenting a challenge for healthcare practitioners on how this clinical care may be planned, delivered and measured.