Usage note: A few usage guides object to the use of practically in the senses “in effect, virtually” and “almost, nearly.” Both uses, however, are well established and standard in all varieties of speech and writing.
Usage Note: Practically has as its primary sense "in a way that is practical": We planned the room practically so we can use it as a study as well as a den. The word has an extended meaning of "for all practical purposes," as in After the accident, the car was practically undrivable. That is, the car can still be driven; it is just no longer practical to do so. Language critics sometimes object when the notion of practicality is stripped from this word in its further extension to mean "all but, nearly," as in He had practically finished his meal when I arrived. But this usage is widely used by reputable writers and must be considered acceptable.