ob·ses·sion 
/ɑbˈsɛʃən/ noun
plural ob·ses·sions /ɑbˈsɛʃən/ noun 1 : a state in which someone thinks about someone or something constantly or frequently especially in a way that is not normal [count] ▪ He was fascinated by the actress and tracking her every move had become an obsession. ▪ She has an obsession about cleanliness. ▪ the object of her obsession [=the thing that she is obessed about] ▪ The restaurant's menu is evidence of the chef's lifelong obsession with international cuisines. [=the chef's lifelong interest in international cuisines] [noncount] ▪ Her concern about cleanliness approaches the level of obsession. ▪ He's concerned about money to the point of obsession. [=he is very/too concerned about money] 2 [count] a : someone or something that a person thinks about constantly or frequently
▪ Cleanliness is her obsession. = Cleanliness is an obsession with her. ▪ Money has become an obsession for him.
b : an activity that someone is very interested in or spends a lot of time doing
▪ Stamp collecting has become an obsession with/for me. [=I have become obsessed with collecting stamps]
▪ Cleanliness is her obsession. = Cleanliness is an obsession with her. ▪ Money has become an obsession for him.
b : an activity that someone is very interested in or spends a lot of time doing
▪ Stamp collecting has become an obsession with/for me. [=I have become obsessed with collecting stamps]
— ob·ses·sion·al /ɑbˈsɛʃənl̟/ adjective [more obsessional; most obsessional]
▪ obsessional [=(more commonly) obsessive] thinking
/ɑbˈsɛʃənl̟/ adjective [more obsessional; most obsessional] ▪ obsessional [=(more commonly) obsessive] thinking
