What is the meaning of Depth?

the vertical distance below a surface; the degree to which something is deep

the distance between the front and the back, as the depth of a drawer or closet

the intensity, complexity, strength, seriousness or importance of an emotion, situation, etc.

lowness

the total palette of available colors

the property of appearing three-dimensional

the deepest part

a very remote part.

the most severe part

the number of simple elements which an abstract conception or notion includes; the comprehension or content

a pair of toothed wheels which work together

the perpendicular distance from the chord to the farthest point of an arched surface

the lower of the two ranks of a value in an ordered set of values

A set of more than one ciphertext enciphered with the same key.

An invariant of rings and modules, encoding information about dimensionality; see Depth (ring theory).

Source: wiktionary.org