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—deepness, n./deep/, adj. deeper, deepest, n., adv., deeper, deepest.adj.1. extending far down from the top or surface: a deep well; a deep valley.2. extending far in or back from the front or from an edge, surface, opening, etc., considered as the front: a deep shelf.3. extending far in width; broad: deep lace; a deep border.4. ranging far from the earth and sun: a deep space probe.5. having a specified dimension in depth: a tank 8 feet deep.6. covered or immersed to a specified depth (often used in combination): standing knee-deep in water.7. having a specified width or number of items from front to back (often used in combination): shelves that are 10 inches deep; cars lined up at the entrance gates three-deep.8. extending or cutting far down relative to the surface of a given object: The knife made a deep scar in the table.9. situated far down, in, or back: deep below the surface; deep in the woods.10. reaching or advancing far down: a deep dive.11. coming from far down: a deep breath.12. made with the body bent or lowered to a considerable degree: a deep bow.13. immersed or submerged in or heavily covered with (fol. by in): a road deep in mud.14. difficult to penetrate or understand; abstruse: a deep allegory.15. not superficial; profound: deep thoughts.16. grave or serious: deep disgrace.17. heartfelt; sincere: deep affections.18. absorbing; engrossing: deep study.19. great in measure; intense; extreme: deep sorrow.20. sound and heavy; profound: deep sleep.21. (of colors) dark and vivid: a deep red.22. low in pitch, as sound, a voice, or the like: deep, sonorous tones.23. having penetrating intellectual powers: a deep scholar.24. profoundly cunning or artful: a deep and crafty scheme.25. mysterious; obscure: deep, dark secrets.26. immersed or involved; enveloped: a man deep in debt.27. absorbed; engrossed: deep in thought.28. Baseball. relatively far from home plate: He hit the ball into deep center field.29. Ling. belonging to an early stage in the transformational derivation of a sentence; belonging to the deep structure.30. go off the deep end,a. to enter upon a course of action with heedless or irresponsible indifference to consequences.b. to become emotionally overwrought.31. in deep water,a. in difficult or serious circumstances; in trouble.b. in a situation beyond the range of one's capability or skill: You're a good student, but you'll be in deep water in medical school.n.32. the deep part of a body of water, esp. an area of the ocean floor having a depth greater than 18,000 ft. (5400 m).33. a vast extent, as of space or time.34. the part of greatest intensity, as of winter.35. Naut. any of the unmarked levels, one fathom apart, on a deep-sea lead line. Cf. mark1 (def. 20).36. the deep, Chiefly Literary. the sea or ocean: He was laid to rest in the deep.adv.37. to or at a considerable or specified depth: The boat rode deep in the water.38. far on in time: He claimed he could see deep into the future.39. profoundly; intensely.40. Baseball. at or to a deep place or position: The outfielders played deep, knowing the batter's reputation as a slugger.41. in deep,a. inextricably involved.b. having made or committed oneself to make a large financial investment.[bef. 900; ME dep, OE deop; akin to Goth diups, ON djupr, OHG tiof]Syn. 14. recondite, mysterious, obscure, profound. 23. sagacious, wise, profound, shrewd.Ant. 1, 10, 15-17, 23. shallow.
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(as used in expressions)deep sea trenchdeep sea ventraptures of the deep* * *
Universalium. 2010.