Depth (septh), n. [From Deep; akin to D. diepte, Icel. d&ymacr;pt, d&ymacr;pð, Goth. 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. [R.] Depth of a sail (Naut.), 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. © Webster 1913
Depth, n. (Aëronautics) The perpendicular distance from the chord to the farthest point of an arched surface. © Webster 1913
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