Deep

1. n. That which is profound, not easily fathomed, or incomprehensible; a moral or spiritual depth or abyss.
2. superl. Extending far below the surface; of great perpendicular dimension (measured from the surface downward, and distinguished from high, which is measured upward); far to the bottom; having a certain depth; as, a deep sea.
3. superl. Extending far back from the front or outer part; of great horizontal dimension (measured backward from the front or nearer part, mouth, etc.); as, a deep cave or recess or wound; a gallery ten seats deep; a company of soldiers six files deep.
4. superl. Low in situation; lying far below the general surface; as, a deep valley.
5. superl. Hard to penetrate or comprehend; profound; — opposed to shallow or superficial; intricate; mysterious; not obvious; obscure; as, a deep subject or plot.
6. superl. Of penetrating or far-reaching intellect; not superficial; thoroughly skilled; sagacious; cunning.
7. superl. Profound; thorough; complete; unmixed; intense; heavy; heartfelt; as, deep distress; deep melancholy; deep horror.
8. superl. Strongly colored; dark; intense; not light or thin; as, deep blue or crimson.
9. superl. Of low tone; full-toned; not high or sharp; grave; heavy.
10. superl. Muddy; boggy; sandy; — said of roads.
11. 1n. 1 That which is profound, not easily fathomed, or incomprehensible; a moral or spiritual depth or abyss.
12. 1superl. 1 Extending far below the surface; of great perpendicular dimension (measured from the surface downward, and distinguished from high, which is measured upward); far to the bottom; having a certain depth; as, a deep sea.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.