Dictionary 1. (n.) The state or quality of being nebulous; cloudiness; haziness; mistiness; nebulousness.2. (n.) The stuff of which a nebula is formed. 3. (n.) A nebula. Thesaurus Black Magellanic Cloud Crab Nebula angry clouds black cat black clouds bright diffuse nebula broken mirror coalsack dark nebula diffuse nebula dust cloud gaseous nebula gathering clouds halcyon bird nebula nebula of Lyra nebular hypothesis nebulosity nebulous stars owl planetary nebula rainbow raven ring nebula shooting star storm clouds stormy petrel the Coalsack thundercloud thunderhead |