deep (dēp)

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[Middle English dep, from Old English dēop.]

adjective: deep·er, deep·est. 

1. 1. Extending far downward below a surface: a deep hole in the river ice.
   2. Extending far inward from an outer surface: a deep cut.
   3. Extending far backward from front to rear: a deep walk-in refrigerator.
   4. Extending far from side to side from a center: a deep yard surrounding the house.
   5. Far distant down or in: deep in the woods.
   6. Coming from or penetrating to a depth: a deep sigh.
   7. Sports Located or taking place near the outer boundaries of the area of play: deep left field.
2. Extending a specific distance in a given direction: snow four feet deep.
3. Far distant in time or space: deep in the past.
4. 1. Difficult to penetrate or understand; recondite: a deep metaphysical theory.
   2. Of a mysterious or obscure nature: a deep secret; ancient and deep tribal rites.
   3. Very learned or intellectual; wise: a deep philosopher.
   4. Exhibiting great cunning or craft: deep political machinations.
5. 1. Of a grave or extreme nature: deep trouble; deepest deceit.
   2. Very absorbed or involved: deep in thought; deep in financial difficulties.
   3. Profound in quality or feeling: a deep trance; deep devotion.
6. Rich and intense in shade. Used of a color: a deep red.
7. Low in pitch; resonant: a deep voice.
8. Covered or surrounded to a designated degree. Often used in combination: waist-deep in the water; ankle-deep in snow.
9. Large in quantity or size; big: deep cuts in the budget.
10. Sports Having a sufficient number of capable reserve players: That team is not very deep.

adverb 

1. To a great depth; deeply: dig deep; feelings that run deep.
2. Well along in time; late: worked deep into the night.
3. Sports Close to the outer boundaries of the area of play: played deep for the first three innings; ran deep into their opponents' territory.

noun 

1. 1. A deep place in land or in a body of water: drowned in the deep of the river.
   2. A vast, immeasurable extent: the deep of outer space.
2. The extent of encompassing time or space; firmament.
3. The most intense or extreme part: the deep of night.
4. The ocean.
5. Nautical A distance estimated in fathoms between successive marks on a sounding line.

idioms

deep down

At bottom; basically: Deep down, she was still a rebel.

in deep water

In difficulty.

derivatives

deeṕly

adverb

deeṕness

noun