N0043600 (nĕb′yə-ləs)adj.1. Cloudy, misty, or hazy.2. Lacking definite form or limits; vague: nebulous assurances of future cooperation.3. Of, relating to, or characteristic of a nebula.[Middle English, from Latin nebulōsus, from nebula, cloud; see nebh- in Indo-European roots.]neb′u·lous·ly adv.neb′u·lous·ness n.Thesaurus