Sustainability - what does it mean?

So what does Sustainability actually mean then? It would seem from reading through the press and CSR literature different things to different people and organisations. In the olden days we would take the tried and trusted ( or should that mean tired and dusty) English Oxford Dictionary meaning almost as gospel however perhaps nowadays we would turn to the global world for comment by referring to a Wikipedia definition:

"an attempt to provide the best outcomes for the human and natural environments both now and into the indefinite future. It relates to the continuity of economic, social, institutional and environmental aspects of human society, as well as the non-human environment. It is intended to be a means of configuring civilization and human activity so that society, its members and its economies are able to meet their needs and express their greatest potential in the present, while preserving biodiversity and natural ecosystems, and planning and acting for the ability to maintain these ideals in a very long term. Sustainability affects every level of organization, from the local neighborhood to the entire planet.Sustainability is an attempt to provide the best outcomes for the human and natural environments both now and into the indefinite future..."

http://en.wikipedia.org/wiki/Sustainability