Depths

Full definition of depths

Plural of depth
(literary) The deepest part. (Usually of a body of water.)Tthe burning ship finally sunk into the depths.
(literary) A very remote part.Into the depths of the jungle...In the depths of the night,
(of an emotion, mystery) The lowest point, all-time low, nadir.To plumb the depths of despairTo stir someone to his depths.
The most severe part.in the depths of the crisis.in the depths of winter.

As the meaning is superlative, it is almost always used with the definite article the