Definition: A preprint is a type of electronic document that has not yet been peer-reviewed, published in a journal or book. Preprints are typically made available to the public for free and can be read by anyone who finds them interesting or relevant. Preprints are often used as a way to disseminate research findings before they have been formally published, and they provide an opportunity for researchers to share their work with others without having to worry about potential conflicts of interest or plagiarism.