Aims: The aim of this concept analysis was to develop a contemporary operational definition of Clinical Judgement in nursing. Design: Concept analysis. Methods: Rodgers' evolutionary method of concept analysis. Throughout the study, the authors followed the SRQR checklist. Results: This concept analysis guided the development of an operational definition of clinical judgement, within the context of nursing, articulated as Clinical judgement is a reflective and reasoning process that draws upon all available data, is informed by an extensive knowledge base and results in the formation of a clinical conclusion. Conclusion: The purpose of this concept analysis was to propose a detailed definition of clinical judgement in nursing, that reflected its theoretical base within today's contemporary healthcare system. Using Rodgers' evolutionary method of concept analysis, surrogate terms, attributes, antecedents and consequences were identified, and a contemporary definition was developed. No patient or public contribution was required to design or undertake this research.