What is an Upset?

The talking heads on TV and the scribbling pens and keyboards in print/online media do not seem to have a good grasp on what an upset is.

So here is my attempt to explain using examples:

An upset

Probational Div-1 team winning at the home of highly touted BCS team (eg North Dakota State winning at Wisconsin)

Team with horrible in-conference road record beating highly touted in-conference foe on their home court (eg Penn State winning at Illinois)

Duke not getting a favorable call during end of game situations (and during the game, and before a game)

A Duke game not shown on national TV, not even ESPN Full Court (eg FSU at Duke)

NOT an upset

average to good in-conference home team beats ranked in-conference foe

#25 team beating #16 team at home

#15 team beating #7 team at home