noun, often attributive
se·​ries | \ˈsir-(ˌ)ēz \
plural series

Definition of series 

1a : a number of things or events of the same class coming one after another in spatial or temporal succession a concert series the hall opened into a series of small rooms

b : a set of regularly presented television programs each of which is complete in itself

2 : the indicated sum of a usually infinite sequence of numbers

3a : the coins or currency of a particular country and period

b : a group of postage stamps in different denominations

4 : a succession of volumes or issues published with related subjects or authors, similar format and price, or continuous numbering

5 : a division of rock formations that is smaller than a system and comprises rocks deposited during an epoch

6 : a group of chemical compounds related in composition and structure

7 : an arrangement of the parts of or elements in an electric circuit whereby the whole current passes through each part or element without branching — compare parallel

8 : a set of vowels connected by ablaut (such as i, a, u in ring, rang, rung)

9 : a number of games (as of baseball) played usually on consecutive days between two teams in town for a 3-game series

10 : a group of successive coordinate sentence elements joined together

12 : three consecutive games in bowling

in series

: in a serial or series arrangement

Examples of series in a Sentence

a five-part series on the history of baseball a series of articles on global warming The Yankees played a three-game series against the Red Sox last week. The play-off series between the two teams begins next week.
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Recent Examples on the Web

And most of all, decisions would have to be made about who pays for a series of projects that would cross jurisdictional boundaries in complicated ways. Matthew Yglesias, Vox, "HQ2 is a perfect opportunity to massively upgrade the DC area’s commuter rail," 17 Nov. 2018 Still there’s a lot to be said for the series as a whole. Dorothy Rabinowitz, WSJ, "‘Escape at Dannemora’ Review: Prison Heartbreak," 15 Nov. 2018 What went wrong: More details Microsoft acknowledged a series of mistakes that occurred during the testing process leading up to the October 2018 Update. Mark Hachman, PCWorld, "Microsoft re-releases the Windows 10 October 2018 Update, admitting its testing needs to improve," 13 Nov. 2018 Families with kids, all welcome, should check out the Encanto Beach Club for a series of swim and splash areas. the resort's secret aviation history. David Jefferys, Condé Nast Traveler, "Puerto Rico's Dorado Beach Is a Bit of Bali, Three Hours from Home," 12 Nov. 2018 Pence was in Japan while accompanying her husband, Mike Pence, on a trip through Asia for a series of meetings, including a Southeast Asian summit in Singapore and an Asia-Pacific Economic Cooperation summit in Papua New Guinea. Yuri Kageyama, The Seattle Times, "AP Interview: US VP’s wife champions art therapy in Japan," 12 Nov. 2018 That’s certainly a necessary step for a series that still has three more movies to go and currently isn’t proceeding at a particularly propulsive rate. Tasha Robinson, The Verge, "Even for the Harry Potter hardcore, Crimes of Grindelwald is one convoluted movie," 8 Nov. 2018 Nikesh Patel, Rebecca Rittenhouse, and John Reynolds have also been tapped for the Hulu series. Caroline Hallemann, Town & Country, "Four Weddings and a Funeral," 29 Oct. 2018 The incident is only the latest in a series of unidentified submarine sightings in Sweden that go back nearly a century. Kyle Mizokami, Popular Mechanics, "Mystery Submarine Spotted in Swedish Waters," 29 Oct. 2018

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

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First Known Use of series

1611, in the meaning defined at sense 1a

History and Etymology for series

Latin, from serere to join, link together; akin to Greek eirein to string together, hormos chain, necklace, and perhaps to Latin sort-, sors lot

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Statistics for series

Last Updated

21 Nov 2018

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Time Traveler for series

The first known use of series was in 1611

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English Language Learners Definition of series

: a number of things or events that are arranged or happen one after the other

: a set of regularly presented television shows involving the same group of characters or the same subject

: a set of books, articles, etc., that involve the same group of characters or the same subject


se·​ries | \ˈsir-ēz \
plural series

Kids Definition of series

: a number of things or events arranged in order and connected by being alike in some way the third book in the series On either side of the rut were a series of ledges.— Louis Sachar, Holes


se·​ries | \ˈsi(ə)r-(ˌ)ēz \
plural series

Medical Definition of series 

1 : a number of things or events of the same class coming one after another in spatial or temporal succession described a new series of cases

2 : a group of specimens or types progressively differing from each other in some morphological or physiological attribute a series of antitoxins

3 : a group of chemical compounds related in composition and structure

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More from Merriam-Webster on series

Spanish Central: Translation of series

Nglish: Translation of series for Spanish Speakers

Britannica English: Translation of series for Arabic Speakers

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