Advance showing refers to a special preview of a movie, TV show, or other form of entertainment that is shown to select audiences before its official release. Synonyms for advance showing include sneak preview, pre-screening, preview screening, test screening, and preview showing. Sneak preview is usually a term used for films, whereas pre-screening is used for TV shows, and preview screening is used for both. Test screening is a process where a film or TV show is shown to a select group of people before it is completed, and their feedback is used to make changes. Overall, each of these synonyms refers to the same concept of presenting a piece of entertainment before it becomes available to the general public.