nebulous

Adjective

• lacking definition or definite content
  • nebulous reasons
    
  • unfixed as were her general notions of what men ought to be- Jane Austen
    

• of or relating to or resembling a nebula
  • the nebular hypothesis of the origin of the solar system
    

• lacking definite form or limits
  • gropes among cloudy issues toward a feeble conclusion- H.T.Moore
    
  • nebulous distinction between pride and conceit
    

Related words

• Synonyms: 
  unfixed , nebular , cloudy , nebulose