WordWeb Online

1. A prominent status
   - importance
    
2. Unusual largeness in size, extent or number
   "limitless grandness of our solar system";
   - enormousness, greatness, immenseness, immensity, sizeableness, vastness, wideness, hugeness, vastitude
    
3. The quality of being magnificent, splendid or grand
   "advertisers capitalize on the grandness and elegance it brings to their products";
   - magnificence, brilliance, splendor [US], splendour [Brit, Cdn], grandeur
    
4. Splendid or imposing in size or appearance
   "the grandness of the architecture";
   - impressiveness, magnificence, richness

Type of: bigness, elegance, elegancy [archaic], excellence, largeness, standing