Pollyanna is a noun that refers to a naively optimistic person. Our word of the day comes from a 1913 novel by Elinor Porter. Pollyanna is both the name of the novel and the protagonist who is characterized by an irrepressible optimism and a tendency to see the good in everything. It is best used to refer to people whose optimism is foolish and perhaps dangerous. I like Karry, but she can be something of a pollyanna. One of these days her optimistic view of life is going to lead her into something horrible.