adj

• (of distance or position; also figurative) Extending, reaching or positioned far from a point of reference, especially downwards.
  "The lake is extremely deep."
• (of distance or position; also figurative) Extending, reaching or positioned far from a point of reference, especially downwards.
  "Diving down to deep wrecks can be dangerous."
• (of distance or position; also figurative) Extending, reaching or positioned far from a point of reference, especially downwards.
  "The shelves are 30 centimetres deep. — They are deep shelves."
• (of distance or position; also figurative) Extending, reaching or positioned far from a point of reference, especially downwards.
  "The water was waist-deep."

adv

• (also deeply) In a profound, not superficial, manner.
  "I thought long and deep."
• (also deeply) In large volume.
  "breathe deep, drink deep"
• (sports) Back towards one's own goal, baseline, or similar.
  "He's normally a midfield player, but today he's playing deep."

noun

• (literary, with "the") The deep part of a lake, sea, etc.
  "creatures of the deep"
• (with "the") The sea, the ocean.
  "How few! yet how they creep / Through my fingers to the deep, / While I weep—while I weep! / O God! can I not grasp / Them with a tighter clasp?"
• (literary, with "the") A silent time; quiet isolation.
  "the deep of night"
• (rare) A deep shade of colour.
  "For our blues we have the azures and ceruleans, lapis lazulis, the light and dusty, the powder blues, the deeps: royal, sapphire, navy, and marine […]"

verb

• (slang, MLE, transitive) To overthink; to treat as being deeper (“more profound, significant”) than in reality.
  "― Ugh, why are these road markings so awfully arranged? ― Quit deeping it bro, just drive, innit."
• (slang, MLE, transitive) To think about, especially deeply (“profoundly”); to consider.
  "No Picasso, I don't care about resistance (Deep dat)."