To me, TED means the translation of a complex idea into inspirational and easy to understand talks. You can find talks on almost any subject, meaning you can learn about anything you wish. To me, a TED talk is usually the starting point to further study of a subject. Or not, in which case I feel like the talk has given me exactly what I wanted or needed at that point.
As a former educator and current civil servant (formulating and putting into practice new methods of facilitating long term care at home) it's the possibility of helping people understand these complex and often life-changing ideas which made me want to be part of the TED Leiden community.