This has bothering me for a quite a while, now: people confusing the name "Agile" with the dictionary definition. Everytime I see a presentation at an Agile track on an Agile conference that starts with its own definition of "Agile" that has no resemblence with Agile Software Development at all, I want to either scream or cry.

Fortunately, William Petri has just published a blog entry on exactly this topic, where he explains in much better words than I would have used what the difference is.

Thank you, William!