The quality or state of being profound; depth of place, knowledge, feeling, etc.

wisdom that is recondite and abstruse and profound; "the anthropologist was impressed by the reconditeness of the native proverbs"

intellectual depth; penetrating knowledge; keen insight; etc; "the depth of my feeling"; "the profoundness of the silence"

a falsehood wrapped round with words and enshrined forever in the endless plodding falsities absorbed by man's dead mind as "truth")

the quality of being physically deep; "the profundity of the mine was almost a mile"