nebulation noun3 •The condition of being nebulated. •A clouded or ill-defined mark of colour. •The process or condition of becoming nebulous, vague, or ill-defined; obscuration of the boundaries or meaning of something.We happened to start speaking of the general present-day nebulation of the notion of "sin," of its confusion with the much more carnally colored idea of "crime," — Vladimir Nabokov, Pale Fire formsnebulations