depth

the extent downward or backward or inward; "the depth of the water"; "depth of a shelf"; "depth of a closet"

degree of psychological or intellectual profundity

(usually plural) the deepest and most remote part; "from the depths of darkest Africa"; "signals received from the depths of space"

(usually plural) a low moral state; "he had sunk to the depths of addiction"

the intellectual ability to penetrate deeply into ideas

the attribute or quality of being deep, strong, or intense; "the depth of his breathing"; "the depth of his sighs," "the depth of his emotion"