Definition of obsession noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//əbˈseʃn//
    ; NAmE NAmE//əbˈseʃn//
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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 somebody thinks about too much Fitness has become an obsession with him. See related entries: Love
  3. Word Originearly 16th cent. (in the sense ‘siege’): from Latin obsessio(n-), from the verb obsidere, from ob- ‘opposite’ + sedere ‘sit’.Extra examples He thinks all women have an obsession with shoes. He was in the grip of an obsession and would not listen to reason. I don’t understand television’s current obsession with cookery programmes. Her devotion to him bordered on obsession. She has an unhealthy obsession with her diet. The campaign has questioned the food industry’s obsession for pristine packaging. The idea grew in his mind until it became something of an obsession. The media’s obsession with the young prince continues.
See the Oxford Advanced American Dictionary entry: obsession