Work engagement is ongoing challenge among nurse leaders, including health care systems, to keep nurses engaged. Conceptual clarity about work engagement gives empirical direction for future research and a theoretical underpinning for the myriad studies about nurses and their work environment. Purpose: The present study was conducted with the aim of clarifying and defining the concept of work engagement, its attributes, antecedents, and consequences. Methods: In this study, the steps of concept analysis were as follows: Select a concept, determine the aims of the analysis, identify various definitions of the concept, determine the concept attributes and identify the antecedents and consequences. All studies between the years 2010 and 2019 were reviewed.  For purposes of this concept analysis, PubMed, Google search engines, Ovid, and ProQuest, were scanned and searched using the keywords. Conclusion: Work engagement is a positive, fulfilling state of mind about work that is characterized by vigor, dedication and absorption. Trust (managerially, organizationally and collegially) and autonomy are the antecedents of work engagement. The outcomes of nurses' work engagement are higher levels of personal initiative that are contagious, decreased hospital mortality rates and significantly higher financial profitability of organizations. There is a need to explore the determinants that encourage work engagement among nurses. Also there is a need to explore the influence of external work environment on nursing work engagement.