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:
http://www.youmayalsolike.co.uk/2014/10/when-is-widow-not-widow.html

More interestingly, I've got a survey in which I'd love to hear your opinions:

What is a widow? TAKE THE SURVEY!
http://www.surveymonkey.com/s/8NT3L8H

Thanks nice typographic people! Please feel free to share the survey, too.