[n] intellectual depth; penetrating knowledge; keen insight; etc; "the depth of my feeling"; "the profoundness of the silence"
[n] the quality of being physically deep; "the profundity of the mine was almost a mile"
[n] the intellectual ability to penetrate deeply into ideas
[n] wisdom that is recondite and abstruse and profound; "the anthropologist was impressed by the reconditeness of the native proverbs"