Defeated vs. Killed

[orcbgone]

I know what killed means, since even card effects explicitly state if it counts as a kill, but there has been much confusion and heated arguments of late, especially among newer players, as to what all counts as defeating a monster without killing it.

One of the largest ones arises from the Wizard ability vs. a Monster enhancer that modifies the Treasure count. Basically the enhancer(s) are played until the Monster to big to beat so the Wizard charms it, then says he/she gets all the additional Treasures and not just the printed total.

So I decided to ask what counts as defeated when it comes to card effects?