The term “Crosby” does not have a standard dictionary definition as it is primarily used as a proper noun, often referring to a surname. It can also be associated with notable individuals, such as Bing Crosby, an American singer and actor famous for his smooth voice and contributions to music and film. Additionally, “Crosby” may refer to various places in the United States, the United Kingdom, or other contexts. If you have a specific context in mind, please provide more details!