obsession Meaning in the Cambridge English Dictionary
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Meaning of “obsession” in the English Dictionary

"obsession" in British English

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obsessionnoun [C or U]

uk   us   /əbˈseʃ.ən/
B2 something or someone that you ​think about all the ​time: an ​unhealthy obsession withdeath her ​chocolate obsession He's always ​wanted to ​find his ​birthmother but ​recently it's become an obsession.
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(Definition of obsession from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"obsession" in American English

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obsessionnoun [C/U]

 us   /əbˈseʃ·ən, ɑb-/
the ​control of one’s ​thoughts by a ​continuous, ​powerfulidea or ​feeling, or the ​idea or ​feeling itself: [U] His ​interest in ​detectivestories has ​turned to obsession. [C] They have an obsession with making ​money.
(Definition of obsession from the Cambridge Academic Content Dictionary © Cambridge University Press)
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