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Adjective: deep (deeper,deepest)  deep
  1. Marked by depth of thinking
    "deep thoughts"; "a deep allegory"
  2. Very distant in time or space
    "deep in the past"; "deep in enemy territory"; "deep in the woods"; "a deep space probe"
  3. Intense or extreme
    "in deep trouble"; "deep happiness"
  4. Not easily disturbed or changed; big or strong
    "a deep breath"; "a deep sigh"; "deep concentration"; "deep emotion"; "a deep trance"; "in a deep sleep"
  5. Having great spatial extension or penetration downward or inward from an outer surface or backward or laterally or outward from a centre; sometimes used in combination
    "a deep well"; "a deep dive"; "deep water"; "a deep casserole"; "a deep gash"; "deep massage"; "deep pressure receptors in muscles"; "deep shelves"; "a deep closet"; "surrounded by a deep yard"; "hit the ball to deep centre field"; "in deep space"; "waist-deep"
  6. Having or denoting a low vocal or instrumental range
    "a deep voice";
    - bass
  7. Strong; intense
    "deep purple";
    - rich
  8. Relatively thick from top to bottom
    "deep carpets"; "deep snow"
  9. Extending relatively far inward
    "a deep border"
  10. (of darkness) densely dark
    "a face in deep shadow"; "deep night";
    - thick
  11. Large in quantity or size
    "deep cuts in the budget"
  12. With head or back bent low
    "a deep bow"
  13. Of an obscure nature
    "a deep dark secret";
    - cryptic, cryptical, inscrutable, mysterious, mystifying
  14. Difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge
    "a deep metaphysical theory";
    - abstruse, recondite
  15. Exhibiting great cunning usually with secrecy
    "deep political machinations"; "a deep plot"
Adverb: deep  deep
  1. To a great depth; far down or in
    "dug deep";
    - deeply
  2. To an advanced time
    "deep into the night";
    - late
  3. To a great distance
    "penetrated deep into enemy territory"; "went deep into the woods"
Noun: deep  deep
  1. The central and most intense or profound part
    "in the deep of night"; "in the deep of winter"
  2. A long steep-sided depression in the ocean floor
    - trench, oceanic abyss
  3. Literary term for an ocean
    "denizens of the deep"

Derived forms: deeper, deeps, deepest

See also: abysmal [literary], abyssal, artful, big, bottomless, broad, colorful [US], colourful [Brit, Cdn], deepness, deep-water, depth, distant, esoteric, heavy, incomprehensible, inexplicable, intense, large, low, low-pitched, profound, sound, thick, unfathomable, unfathomed, unplumbed, unsounded, wakeless, walk-in, wide

Type of: depression, middle, natural depression, ocean

Antonym: shallow

Encyclopedia: Deep, Deep Trouble