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English definition of “deep”

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deep

adjective, adverb [-er/-est only]  /dip/ us  

deep adjective, adverb [-er/-est only] (DOWN)

going or being a long way down from the top or surface, or being at a particular distance down from the top: She had a deep cut on her left arm. During the flood, the water in the basement was knee-deep (= it would reach the knees of an average adult).

deep

adjective  /dip/ us  

deep adjective (FRONT TO BACK)

having a (sometimes stated) distance from front to back: I want the bookcase shelves to be 12 inches deep. The crowd along the parade route was six deep (= in six rows).

deep adjective (STRONGLY FELT)

strongly felt or experienced, or having a strong and lasting effect: Our deep love for each other will last forever. He awoke from a deep sleep. Joseph, deep in thought (= thinking so much that he is not aware of others), didn’t hear Erin enter the room.

deep adjective (COMPLICATED)

[-er/-est only] difficult to understand; complicated: His book on how the brain works is too deep for me.

deep adjective (LOW SOUND)

[-er/-est only] (of a sound) low: He was a large man with a deep voice.

deep adjective (DARK)

[-er/-est only] (of a color) strong and dark: The sky is a deep blue.
(Definition of deep from the Cambridge Academic Content Dictionary © Cambridge University Press)
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