depth depth /ˈdɛpθ/

noun

1. () The extent downward, backward or inward  ( deepness , depth )
   the extent downward, backward or inward
    The depth of the water
   the depth of the water
    Depth of a shelf
   depth of a shelf
    Depth of a closet
   depth of a closet
   
2. () Degree of psychological or intellectual profundity  ( depth )
   degree of psychological or intellectual profundity
     The depth of her knowledge on the subject was impressive.
   The depth of her knowledge on the subject was impressive.
   
3. The attribute or quality of being deep, strong, or intense  ( depth )
   the attribute or quality of being deep, strong, or intense
    The depth of his breathing
   the depth of his breathing
    The depth of his sighs
   the depth of his sighs
    The depth of his emotion
   the depth of his emotion
   
4. The intellectual ability to penetrate deeply into ideas  ( astuteness , deepness , depth , profoundness , profundity )
   the intellectual ability to penetrate deeply into ideas
   
5. (usually plural) a low moral state  ( depth )
   (usually plural) a low moral state
    He had sunk to the depths of addiction
   he had sunk to the depths of addiction