Open Auditions is an industry term meaning "Anyone can audition."
Shows like "American Idol" and "America's Next Top Model" are great examples of open auditions. Usually an open audition is announced through the media and is held on a specific day or weekend, depending on the project and the turnout. A lot of producers and casting directors use open auditions to find fresh talent and new faces. Open auditions also give a person who is casually thinking about acting, a chance to try out, without needing the experience or agency help to audition for a role.
To learn more about open auditions and what to expect when attending one, go to open auditions.