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

This time, anti-Trump organizers planned a series of protests. Jill Colvin And Paul Kelbie,, "Trump lies low in Scotland ahead of high-stakes meeting with Putin," 14 July 2018 Elliott is on the verge of his first Cup Series win, Kyle Larson is bound to have his first 2018 victory, but Ford and Toyota have control of the series. Michelle R. Martinelli, For The Win, "6 reasons 2018 is one of the weirdest NASCAR seasons," 12 July 2018 This is part of a series of efforts Facebook is making to become more transparent and accountable after misinformation plagued social media platforms throughout the 2016 presidential election. Bree Tracey, Fox News, "How under-fire Facebook is bolstering its battle against fake news," 12 July 2018 The Utes, who beat Mizzou 77-59 in Salt Lake City last season for the first game of a home-and-home series, were supposed to play at MU this coming season. Aaron Reiss, kansascity, "Mizzou basketball’s home game against the Utah Utes has been rescheduled," 12 July 2018 Harington previously opened up about the early days of their romance, revealing that sparks flew while on set in Iceland shooting season 2 — and admitting that those weeks were his favorite of the series. Aurelie Corinthios,, "Kit Harington and Rose Leslie Are the Picture of Newlywed Bliss While Stepping Out in London," 11 July 2018 That would certainly resolve the sensor weakness of the 1 series. Chris Welch, The Verge, "Nikon discontinues its Nikon 1 lineup of mirrorless cameras," 11 July 2018 Nigeria’s main north-eastern city is at the centre of a series of jihadist campaigns stretching in two broad belts across Africa on either side of the Sahara. The Economist, "The fight against Islamic State is moving to Africa," 14 July 2018 The state created the Aaron Feis Guardian program this year as part of a series of school safety measures enacted in the wake of the Feb. 14 massacre at Marjory Stoneman Douglas High in Parkland. Scott Travis,, "Most applying to be Broward armed guardians fail to meet qualifications," 13 July 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

12 Sep 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

Comments on series

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the setting in which something occurs

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