tril·​o·​gy ˈtri-lə-jē How to pronounce trilogy (audio)
plural trilogies
: a series of three dramas or literary works or sometimes three musical compositions that are closely related and develop a single theme

Did you know?

Dozens of tragic trilogies were written for the Greek stage, though only one, Aeschylus's great Oresteia (consisting of Agamemnon, The Libation Bearers, *and *The Eumenides), has survived complete. Authors in later years have occasionally chosen to create trilogies to allow themselves to develop a highly complex story or cover a long span of time. Tolkien's Lord of the Rings wasn't actually intended as a trilogy, but since it was published in three volumes it's usually called one. George Lucas's three original Star Wars movies are an example of a film trilogy (which he followed many years later by another).

Example Sentences

the last book in the trilogy
Recent Examples on the Web The entire John Wick trilogy is available to stream. Eric Ravenscraft Brian Barrett Reece Rogers, WIRED, 2 Nov. 2022 With that kind of long-term plan, a trilogy for Farrell and Gleeson could be natural. Jake Coyle, ajc, 18 Oct. 2022 Full of dimensional characters, a pulse-pounding plot, and profound social commentary, The Hunger Games trilogy is some of the 21st century's best in YA and dystopian fiction. Robert English,, 17 Sep. 2022 The beloved The Santa Clause trilogy is back, this time in the form of a television series. Maggie Horton, Country Living, 5 Sep. 2022 Perhaps most important, the Sam Raimi Spider-Man trilogy will be available starting on the first of the month. Elizabeth Logan, Glamour, 20 July 2022 In the original trilogy, Zakhaev was the leader of the Ultranationalists, a revolutionary paramilitary group that accuses the current government of being corrupted by Western ideology and interests. Jonathan Lee, Washington Post, 31 Oct. 2022 At this point, every speaking character in the original trilogy has received their own Disney+ spinoff — except one. Ew Staff,, 29 Sep. 2022 Joining the foursome are Bart Johnson and Alyson Reed, who played the adults of East High — Coach Bolton and Mrs. Darbus, respectively — in the original trilogy. Glenn Rowley, Billboard, 23 Sep. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trilogy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


Greek trilogia, from tri- + -logia -logy

First Known Use

circa 1661, in the meaning defined above

Time Traveler
The first known use of trilogy was circa 1661

Dictionary Entries Near trilogy

Cite this Entry

“Trilogy.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2022.

Kids Definition



tril·​o·​gy ˈtril-ə-jē How to pronounce trilogy (audio)
plural trilogies
: a series of three literary, dramatic, or musical works that are closely related and develop a single theme
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.