1. The quality of being deep, intense, or absolute
   "the profoundness of the silence"; "The profoundness of their grief left them speechless";
   - profundity
    
2. The quality of showing deep understanding, insight, or perception
   "The profoundness of his writing was widely recognized";
   - astuteness, profundity, depth, deepness
    
3. The quality of being difficult to understand or obscurely profound
   "the anthropologist was impressed by the profoundness of the native proverbs";
   - reconditeness, abstruseness, abstrusity, profundity
    
4. The quality of being physically deep
   "The profoundness of the ocean trench amazed the researchers";
   - deepness, profundity

Type of: deepness, depth, sapience, wisdom

Antonym: shallowness