Rose is basically any wine where the juice is left in contact with the skin long enough to develop some red color without becoming completely red. All grape juice is the same basic color, whether the grapes are green (white) or black/purple (red). However, in the production of red wines, the skins are left in contact with the juice, and the color (among other things) are leeched into the wine. So it follows that if one were to leave the skins in contact with the juice for less time, there would be less extraction of color and tannin. Now, Rose can also categorize a style of champagne in which the above method takes place, and then the wine is vinified just as other champagne. For rose champagne, there are a lot of laws to be followed. Rose champagne is a very great product, and very well respected (when made right). However, rose does not always have to be sparkling. In a very general way of speaking, European rose is typically dry while American rose is usually sweet (these would be the blush wines you refer to). Typically, Euro (or Old World) rose is lighter in style and easily drinkable. Pairs well with food. This is why something like Tempier Bandol Rose is quite well respect. However, American (New World) rose is usually all thrown into the bucket of "White Zinfandel" and gets little to no respect. But there are still roses that are produced in the new world that are respectable. The thing is that there is a huge divide between the dryer, lighter, style of rose that is respected and the sickly sweet stuff that is the same style of white zinfandel. Regardless of whether one enjoys it or not, rose can range in many styles other than blush. And Rose champagne is some of my favorite. Especially Jean Vesselle Brut Rose de Saignee Nonvintage.