1. The quality of being unclear or abstruse and hard to understand
   "The obscureness of the ancient text puzzled scholars";
   - obscurity, abstruseness, reconditeness
    
2. The state of being indistinct or indefinite for lack of adequate illumination
   "The obscureness of the writing in the old manuscript challenged even expert readers";
   - obscurity
    
3. The state of being humble and unimportant
   "The obscureness of the small town appealed to those seeking a quiet life";
   - humbleness, unimportance, lowliness

Type of: incomprehensibility, obscurity, semidarkness