A
trilogy (from
Greek τρι- , "three" and -λογία
-logia, "discourse") is a set of three works of art that are connected, and that can be seen either as a single work or as three individual works. They are commonly found in
literature, film, or
video games. Three-part works that are considered components of a larger work also exist, such as the
triptych or the three-movement
sonata, but they are not commonly referred to with the term "trilogy."