Originally Posted by retinax
That would be the degree of blurring or defocusing or something like that, it's been a long time since I've read anyone on this well-educated forum refer to that as "bokeh". Bokeh is the quality of the defocused areas or, some people say, the quality of the the transition.
I'm with him
The quality of the shapes in the out of focus area. Soft = more appealing to the eye than sharp/edgy.