A widow IS NOT one stub end word on its own at the end of a paragraph.
Or that's what I always thought.
Typographic widows mean different things to different people. I've written a piece about my findings so far:
More interestingly, I've got a survey in which I'd love to hear your opinions:
What is a widow? TAKE THE SURVEY!
Thanks nice typographic people! Please feel free to share the survey, too.