Definition of deep adjective from the Oxford Advanced Learner's Dictionary

      

    deep

     adjective
    adjective
    BrE BrE//diːp//
     
    ; NAmE NAmE//diːp//
     
    (deeper, deepest)
     
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    top to bottom
  1. 1  having 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 furthest point inside a deep cut/wound a deep space opposite shallow
  4. measurement
  5. 3  used 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. 7  low I heard his deep warm voice filling the room. a deep roar/groan
  13. colours
  14. 8  strong and dark a rich deep red opposite pale
  15. sleep
  16. 9  a person in a deep sleep is difficult to wake to be in a deep sleep/trance/coma opposite light
  17. serious
  18. 10  extreme 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. 11  strongly felt synonym sincere deep respect a deep sense of loss
  21. knowledge
  22. 12  showing great knowledge or understanding a deep understanding
  23. difficult to understand
  24. 13  difficult to understand synonym profound This discussion's getting too deep for me. He pondered, as if over some deep philosophical point.
  25. involved
  26. 14deep 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.
  27. person
  28. 15if a person is deep, they hide their real feelings and opinions She's always been a deep one, trusting no one.
  29. in sport
  30. 16to or from a position far down or across the field a deep ball from Brown
  31. see also depth
    Word Familydeep adjective adverbdeeply adverbdeepen verbdepth noun Word Origin Old English dēop (adjective), dīope, dēope (adverb), of Germanic origin; related to Dutch diep and German tief, also to dip.Extra examples She stood knee deep in the water. The water looks quite deep there. This suspicion runs very deep among some government members. a very deep feeling of love He expressed deep concern over the government’s handling of the incident. He had a pale face with deep blue eyes. Her lipstick was a deep shade of scarlet. I felt a deep sense of loss when I heard of her death. None of the insights contained in the book were particularly deep. She had reached a deep understanding of the local culture. The colour is deeper when the grapes are dried. They spent hours discussing deep philosophical issues. This discussion is getting too deep for me. We heard a deep roar in the distance. We will need a deeper analysis of this problem. a deep cut/​wound/​space a deep hole/​well/​river deep water/​snowIdioms
    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
    (informal) to suddenly become very angry or emotional (informal) in trouble or difficulty
    in the shit, in deep shit
     
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    in trouble I'll be in the shit if I don't get this work finished today. You’re in deep shit now.
    jump/be thrown in at the deep end
     
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    (informal) to start or be made to start a new and difficult activity that you are not prepared for Junior hospital doctors are thrown in at the deep end in their first jobs.
See the Oxford Advanced American Dictionary entry: deep