Definition of “deepen” - English Dictionary

“deepen” in British English

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deepenverb

uk /ˈdiː.pən/ us /ˈdiː.pən/

deepen verb (DARK)

[ I ] to become darker:

The shadows deepened as the sun dropped below the horizon.

(Definition of “deepen” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“deepen” in American English

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deepenverb [ I/T ]

us /ˈdi·pən/

to become more strongly felt or experienced, or to make something this way:

[ I ] Over the years, her love for him deepened.

(Definition of “deepen” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“deepen” in Business English

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deepenverb [ I or T ]

uk /ˈdiːpən/ us

to increase or become more serious; to make something increase or become more serious:

There are fears that the crisis in the Pacific region could deepen considerably.
Some experts say raising interest rates to fight inflation might deepen the economic slowdown.
To deepen its relationships with advertisers, the company has begun to offer corporate customers access to research about online consumers.

(Definition of “deepen” from the Cambridge Business English Dictionary © Cambridge University Press)