Neither superficial nor shallow

adjective

1. Extending far downward

   "a deep well"

2. Extending well back from a surface accepted as front

   "a deep closet"

3. Extending far laterally from the center

   "deep borders of lace"

4. Occurring or located near the outer limits of the playing area

   "hit to deep right field"

5. Thrown or hit for a considerable distance thrown or hit deep see deep

   "a deep pass"

6. Having a specified extension in an implied direction usually downward or backward

   "a shelf 20 inches deep"

7. Difficult to penetrate or comprehend recondite

   "deep mathematical problems"

8. Mysterious, obscure

   "a deep dark secret"

9. Grave or lamentable in nature or effect

   "in deepest disgrace"

10. Of penetrating intellect wise

    "a deep thinker"

11. Intensely engrossed or immersed

    "She was deep in her book."

12. Characterized by profundity of feeling or quality

    "a deep sleep"

13. High in saturation and low in lightness

    "a deep red"

14. Having a low musical pitch see pitch or pitch range

    "a deep voice"

15. Situated well within the boundaries

    "a house deep in the woods"

16. Remote in time or space

    "found deep in rural England"

17. Being below the level of consciousness

    "deep neuroses"

18. Covered, enclosed, or filled to a specified degree
19. Large

    "deep discounts"

20. Having many good players

    "a deep bullpen"

21. Having or using many repetitions of algorithmic processing

    "deep learning"

adverb

1. To a great depth deeply

   "still waters run deep"

2. Far on late

   "danced deep into the night"

3. Near the outer limits of the playing area

   "the shortstop was playing deep"

4. Long

   "threw deep to the wide receiver"

noun

1. A vast or immeasurable extent abyss
2. Any of the deep portions of a body of water
3. The middle or most intense part

   "in the deep of winter"

4. Any of the fathom points on a sounding line other than the marks see mark

noun

1. A song that is considerably less popular and well-known than other songs on the same album or by the same artist

   "From there, the band careened through highlights and the occasional deep cut from its catalog …"

2. Something (such as an obscure reference to a book or movie) that is recognizable to devotees but not usually to others

   "One of the fun things about being a Marvel fan is the franchise's ability to constantly surprise its audience with comic book deep cuts, surprising castings, and twists that no one sees coming."

adjective

1. Baked in a deep dish

   "a deep-dish pizza"

noun

1. An exhaustive investigation, study, or analysis of a question or topic

   "A deep dive into 2018 congressional transcripts found that female representatives spent more than twice as much time on health care in their speeches as male legislators did."

noun

1. A movement or a body of concepts that considers humans no more important than other species and that advocates a corresponding radical readjustment of the relationships between humans and nature

noun

1. Hot fat or oil deep enough in a cooking utensil to cover the food to be fried

noun

1. A photographic effect or technique (as in filmmaking) characterized by great depth of field

verb

1. Quick-freeze
2. To store in a frozen state