DEPTHS
depths
(noun) (plural) the deepest and most remote part; “from the depths of darkest Africa”; “signals received from the depths of space”
Source: WordNet® 3.1
Noun
depths
plural of depth
(literary) The deepest part. (Usually of a body of water.)
(literary) A very remote part.
(of an emotion, mystery) The lowest point, all-time low, nadir.
The most severe or involved period.
Usage notes
• Since the meaning is superlative, it is almost always used with the definite article the.
Source: Wiktionary
DEPTH
Depth, n. Etym: [From Deep; akin to D. diepte, Icel. d, d, Goth.
diupi.]
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)
Definition: The number of simple elements which an abstract conception or
notion includes; the comprehension or content.
6. (Horology)
Definition: 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 sail.
Source: Webster’s Unabridged Dictionary 1913 Edition