Length
Part of speech: noun
Definition: The measurement of distance along the longest dimension of an object. duration The length of a horse, used to indicate the distance between horses at the end of a race. Distance between the two ends of a line segment. The distance down the pitch that the ball bounces on its way to the batsman. total extent part of something that's long, a physical piece of something
Depth
Part of speech: noun
Definition: The vertical distance below a surface; the amount that 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, or situation.The total palette of available colors.The property of appearing three-dimensional.The lower of the two ranks of a value in an ordered set of values.