Definition of infatuation noun from the Oxford Advanced American Dictionary

 

infatuation

 noun
noun
NAmE//ɪnˌfætʃuˈeɪʃn//
 
[countable, uncountable]infatuation (with/for somebody/something)
 
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very strong feelings of love or attraction for someone or something, especially when these are unreasonable and do not last long It isn't love, it's just a passing infatuation.
See the Oxford Advanced Learner's Dictionary entry: infatuation