Definition of deep adjective from the Oxford Advanced American Dictionary

      

    deep

     adjective
    adjective
    NAmE//dip//
     
    (deeper, deepest)
     
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    top to bottom
  1. 1having a large distance from the top or surface to the bottom a deep hole/well/river deep water/snow opposite shallow
  2. front to back
  3. 2 having a large distance from the front edge to the farthest point inside a deep cut/wound a deep space opposite shallow
  4. measurement
  5. 3used to describe or ask about the depth of something The water is only a few inches deep. How deep is the wound?
  6. -deep
  7. 4(in adjectives) as far up or down as the point mentioned The water was only waist-deep so I walked ashore.
  8. 5(in adjectives) in the number of rows mentioned, one behind the other They were standing three-deep at the bar.
  9. breath/sigh
  10. 6[usually before noun] taking in or giving out a lot of air She took a deep breath. He gave a deep sigh.
  11. sounds
  12. 7low I heard his deep warm voice filling the room. a deep roar/groan
  13. colors
  14. 8strong and dark a rich deep red opposite pale
  15. sleep
  16. 9a person in a deep sleep is difficult to wake to be in a deep sleep/trance/coma opposite light
  17. serious
  18. 10extreme or serious He's in deep trouble. a deep economic recession The affair had exposed deep divisions within the party. a place of great power and of deep significance
  19. emotions
  20. 11strongly felt synonym sincere deep respect a deep sense of loss
  21. knowledge
  22. 12showing great knowledge or understanding a deep understanding
  23. difficult to understand
  24. 13difficult to understand synonym profound This discussion's getting too deep for me. He pondered, as if over some deep philosophical point.
  25. person
  26. 14 serious and thinking hard about complex issues She's a very deep person, extremely intelligent. opposite shallow
  27. involved
  28. 15deep in something fully involved in an activity or a state to be deep in thought/conversation He is often so deep in his books that he forgets to eat. The firm ended up deep in debt.
  29. in sports
  30. 16 a deep ball is hit, thrown, or kicked to or from a position far down or across the field Fiedler throws a good deep ball. see also depth
  31. Word Familydeep adjective adverbdeeply adverbdeepen verbdepth nounIdioms
    between the devil and the deep blue sea
     
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    in a difficult situation where there are two equally unpleasant or unacceptable choices
    go off the deep end(informal)
     
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    to suddenly become very angry or emotional
    in deep water(s)(informal)
     
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    in trouble or difficulty
    jump/be thrown in/into the deep end(informal)
     
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    to start or be made to start a new and difficult activity that you are not prepared for Medical interns are thrown in the deep end in their first jobs.
See the Oxford Advanced Learner's Dictionary entry: deep