There are over 300 definitions of the term. Most used, is this one from the World Commission on Environment and Development Report 1987 – also known as the Brundtland Commission.
‘Development that meets the needs of the present without compromising the ability of future generations to meet their own needs.’
Resources of sustainable development:
View Wikipedia article here
There is a PowerPoint presentation on sustainable development, innovation and lifelong learning in TVET in the Documents section of this group.