1. plural of trilogy; series of three related works, especially books, films, or plays

Examples

• The Lord of the Rings and The Hobbit are among the most famous fantasy trilogies.
• Many movie studios now plan their films as trilogies to maximize profits.
• She has written several trilogies about different historical periods.
• The library has a special section dedicated to science fiction trilogies.
• Both trilogies won multiple awards for their storytelling.
• Students often study classic trilogies in their literature classes.