trilogy
n. countablen. a group of three books, movies, or plays that are connected by the same story or characters. You usually read or watch them in a specific order to understand the whole plot.
n. a set of three related creative works, such as novels or films, that share a continuous narrative or common theme.
The final book in the trilogy comes out next month.
After the success of the first film, the director announced he would turn the story into a trilogy.
While the first installment was a critical darling, the middle chapter of the trilogy suffered from a lack of narrative momentum that was only resolved in the final act.
PIE word *tréyes Learned borrowing from Latin trilogia, itself borrowed from Ancient Greek τριλογία (trilogía, “trilogy”). Morphologically from tri- + -logy.
Commonly followed by the preposition 'of' when specifying the subject matter.