1. a series of three related works, especially books, plays, or films

Examples

• The Lord of the Rings is a famous fantasy trilogy.
• She completed her trilogy of novels about the Civil War.
• The Star Wars original trilogy was released in the 1970s and 1980s.
• The playwright’s trilogy explores themes of family and betrayal.
• Many readers eagerly awaited the final book in the trilogy.
• The film trilogy grossed over a billion dollars worldwide.