Student engagement is widely recognised as an important influence on achievement and learning in higher education and as such is being widely theorised and researched. This article firstly reviews and critiques the four dominant research perspectives on student engagement: the behavioural perspective, which foregrounds student behaviour and institutional practice; the psychological perspective, which clearly defines engagement as an individual psycho-social process; the socio-cultural perspective, which highlights the critical role of the socio-political context; and, finally, the holistic perspective, which takes a broader view of engagement. Key problems are identified, in particular poor definitions and a lack of distinction between the state of engagement, factors that influence student engagement, and the immediate and longer term consequences of engagement. The second part of the article presents a conceptual framework that overcomes these problems, incorporating valuable elements from each of the perspectives, to enable a better shared understanding of student engagement to frame future research and improve student outcomes.