Webster's Revised Unabridged Dictionary · 1913

Depth

Depth (septh) , noun

[From Deep; akin to Dutch diepte, Icelandic dȳpt, dȳpe, Gothic diupiþa.]

1.
The quality of being deep; deepness; perpendicular measurement downward from the surface, or horizontal measurement backward from the front; as, the depth of a river; the depth of a body of troops.
2.
Profoundness; extent or degree of intensity; abundance; completeness; as, depth of knowledge, or color.
Mindful of that heavenly love Which knows no end in depth or height. — Keble
3.
Lowness; as, depth of sound.
4.
That which is deep; a deep, or the deepest, part or place; the deep; the middle part; as, the depth of night, or of winter.
From you unclouded depth above. — Keble
The depth closed me round about. — Jonah ii. 5
5.
(Logic) The number of simple elements which an abstract conception or notion includes; the comprehension or content.
6.
(Horology) A pair of toothed wheels which work together. [Rare]
7.
(Aeronautics) The perpendicular distance from the chord to the farthest point of an arched surface.
8.
(Computers) the maximum number of times a type of procedure is reiteratively called before the last call is exited; -- of subroutines or procedures which are reentrant; -- used of call stacks.
Collocations (1)
Depth of a sail (Nautical) , the extent of a square sail from the head rope to the foot rope; the length of the after leach of a staysail or boom sail; -- commonly called the drop of a sail.