noun tril·o·gy \ˈtri-lə-jē\

: a series of three novels, movies, etc., that are closely related and involve the same characters or themes

plural tril·o·gies

Full Definition of TRILOGY

:  a series of three dramas or literary works or sometimes three musical compositions that are closely related and develop a single theme

Examples of TRILOGY

  1. the last book in the trilogy

Origin of TRILOGY

Greek trilogia, from tri- + -logia -logy
First Known Use: circa 1661


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