depth (Noun) — The extent downward, backward or inward. ex. "depth of a shelf" ex. "the depth of the water"
depth (Noun) — Degree of psychological or intellectual profundity.
depth (Noun) — (usually plural) the deepest and most remote part. ex. "from the depths of darkest Africa" ex. "signals received from the depths of space"
depth (Noun) — (usually plural) a low moral state. ex. "he had sunk to the depths of addiction"
depth (Noun) — The intellectual ability to penetrate deeply into ideas.
depth (Noun) — The attribute or quality of being deep, strong, or intense. ex. "the depth of his breathing" ex. "the depth of his sighs," ex. "the depth of his emotion"