n. [ L. nebulositas: cf. F. nébulosité ] 1. The state or quality of being nebulous; cloudiness; haziness; mistiness; nebulousness. [ 1913 Webster ]
The nebulosity . . . of the mother idiom. I. Disraeli. [ 1913 Webster ]
2. (Astron.) (a) The stuff of which a nebula is formed. (b) A nebula. [ 1913 Webster ]