: a feeling of foolish or obsessively strong love for, admiration for, or interest in someone or something : strong and unreasoning attachment
She speaks openly about the real-life subject of one of her songs, a conservatory teacher who is both a neighbor in her apartment building and the unwilling object of her obsessive infatuation. Sasha Frere-Jones
Craig Claiborne wrote about it in 1963, when he was deep in his infatuation with dill and meatballs and all things Nordic. Amanda Hesser
2
: the object of an unreasoning or foolish attachment
And then, I began trying to forge their autographs. I'm not sure why I did it at first, but it became an infatuation. Zach Selwyn