Spirituality is a universal human phenomenon, yet conceptual confusion, ambiguity and scientific scepticism have prevented adequate investigation into its potential healing effects A recent resurgence of interest in non-medical sources of healing and holistic medical practices is causing increased speculation regarding the nature of spirituality The lack of conceptual clarity, and absence of a precise theoretical definition, prevent recognition of spiritual distress and, hence, appropriate nursing intervention In this paper, current usage and definitions of spirituality are discussed and a philosophical definition of 'spirituality as integrative energy’ is proposed The metaphysical nature of this phenomenon makes it the proper concern of philosophy, consequently, a philosophical analysis of the aforestated proposition was completed using the five predicables of logic theory species, genus, differentia, logical property and logical accident Implications of this definition for providing holistic nursing care are also presented