Infatuation is falling in love with or becoming extremely interested in someone or something for a short time. If you have an infatuation with a particular singer, you probably listen to her on repeat all day long, at least this week.
If something infatuates you, it has caused you to become foolish. We say you have an infatuation when you express a crazy, extreme love of something––a person, a style, a band, anything. Infatuations usually don’t last. Like incredibly intense crushes or the stomach flu, infatuations come on strong and then get forgotten.