American English

Definition of obsession noun from the Oxford Advanced American Dictionary



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  1. 1[uncountable] the state in which a person's mind is completely filled with thoughts of one particular thing or person, in a way that is not normal Her fear of flying is bordering on obsession. obsession with somebody/something The media's obsession with the young prince continues.
  2. 2[countable] obsession (with somebody) a person or thing that someone thinks about too much Fitness has become an obsession with him.
See the Oxford Advanced Learner's Dictionary entry: obsession