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Definition of deep adverb from the Oxford Advanced American Dictionary

  

deep

 adverb
adverb
NAmE//dip//
 
(deep‧er, deep‧est) deep (below, into, under, etc.)
 
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  •  a long way below the surface of something or a long way inside or into something Dig deeper! The miners were trapped deep underground. whales that feed deep beneath the waves He gazed deep into her eyes. They sat and talked deep into the night (= until very late). deep in the forest He stood with his hands deep in his pockets.
    • Which Word?deep / deeply
    • The adverbs deep and deeply can both mean “a long way down or into something.”Deep can mean only this and is more common than deeply in this sense. It is usually followed by a word like into or below:We decided to go deeper into the jungle.
    • Deeply usually means “very much”:deeply in love deeply hurt.You can use deep down (but not deeply) to talk about a person’s real nature:She can seem stern, but deep down she’s a very kind person. She can seem stern, but deeply she’s a very kind person.
     deep adjective adverbdeeply adverbdeepen verbdepth noun    Idioms
      deep down
       
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    1. 1if you know something deep down, you know your true feelings about something, although you may not admit them to yourself Deep down I still loved him.
    2. 2if something is true deep down, it is really like that, although it may not be obvious to people He seems confident but deep down he's quite insecure.
      dig deep (into something)
       
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    1. 1to search thoroughly for information You'll need to dig deep into the records to find the figures you want.
    2. 2to try hard to provide the money, equipment, etc. that is needed We're asking you to dig deep for the earthquake victims.
    go/run deep
     
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    (of emotions, beliefs, etc.) to be felt in a strong way, especially for a long time Feelings about the death of a parent are bound to go deep. Dignity and pride run deep in this community.
    in (too) deep
     
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    very involved in a situation He knew he was in deep when his girlfriend got him an expensive birthday gift.
    still waters run deep (saying)
     
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    a person who seems to be quiet or shy may surprise you by knowing a lot or having deep feelings
    See deep in the Oxford Advanced Learner's Dictionary
    Check pronunciation: deep

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