1.Definition: extremeness of degree

"The profoundness of his ignorance"

Category: General

2.Definition: intellectual depth; penetrating knowledge; keen insight; etc

"The depth of my feeling", "The profoundness of the silence"

Related Noun(s):profundity

Category: General

3.Definition: the intellectual ability to penetrate deeply into ideas

Related Noun(s):astuteness, deepness, depth, profundity

Category: General

4.Definition: the quality of being physically deep

Related Noun(s):deepness, profundity

Category: General

5.Definition: wisdom that is recondite and abstruse and profound

Related Noun(s):abstruseness, abstrusity, profundity, reconditeness

Category: General