extending far down from the top or surface: a deep well; a deep valley.
extending far in or back from the front or from an edge, surface, opening, etc., considered as the front: a deep shelf.
extending far in width; broad: deep lace; a deep border.
ranging far from the earth and sun: a deep space probe.
having a specified dimension in depth: a tank 8 feet deep.
covered or immersed to a specified depth (often used in combination): standing knee-deep in water.
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.
extending or cutting far down relative to the surface of a given object: The knife made a deep scar in the table.
situated far down, in, or back: deep below the surface; deep in the woods.
reaching or advancing far down: a deep dive.
coming from far down: a deep breath.
made with the body bent or lowered to a considerable degree: a deep bow.
immersed or submerged in or heavily covered with (followed by in): a road deep in mud.
difficult to penetrate or understand; abstruse: a deep allegory.
not superficial; profound: deep thoughts.
grave or serious: deep disgrace.
sound and heavy: deep sleep.
(of colors) dark and vivid: a deep red.
low in pitch, as sound, a voice, or the like: deep, sonorous tones.
having penetrating intellectual powers: a deep scholar.
profoundly cunning or artful: a deep and crafty scheme.
immersed or involved; enveloped: a man deep in debt.
absorbed; engrossed: deep in thought.
Baseball.
relatively far from home plate: He hit the ball into deep center field.
Linguistics.
belonging to an early stage in the transformational derivation of a sentence; belonging to the deep structure.