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

Given that Jimmy Yacabonis, who has started twice this season, has been scratched from Sunday’s turn because of an undisclosed illness, manager Buck Showalter suggested Tillman might be an option for the series finale against the Texas Rangers. Katherine Fominykh,, "Orioles notes: Chris Tillman a possibility for Sunday start against Rangers," 14 July 2018 Tens of thousands of people gathered in London for a series of demonstrations against the president’s visit. Washington Post, "Trump pulls diplomatic backflip, praising May after barbs," 13 July 2018 Highmore portrayed Bates throughout the duration of the TV show, until the series finale in 2017. Temi Adebowale, Country Living, "How Freddie Highmore Went From Child Actor to Star of 'The Good Doctor'," 11 July 2018 Cishek likely is unavailable to pitch in Wednesday’s series finale against the Giants after earning the save Tuesday night in his third consecutive game. Mark Gonzales,, "Cubs bullpen rotation: Steve Cishek won't pitch Wednesday, Brandon Morrow available again," 11 July 2018 The Angels intend to have Skaggs come off the disabled list and start Thursday in the series finale against the Mariners. Jeff Miller,, "Tyler Skaggs could return Thursday for the Angels, Nick Tropeano not quite yet," 11 July 2018 Greene said before Wednesday’s series finale against the Tampa Bay Rays. Anthony Fenech, Detroit Free Press, "Detroit Tigers' Shane Greene to be activated after aneurysm scare," 11 July 2018 His performance in the pivotal garage scene in the series finale was unforgettable. Matthew Gilbert,, "One last chance for Emmy voters to get it right," 10 July 2018 Season 6, which has yet to be given a premiere date, will be the series finale. Rebecca Farley,, "Robin Wright Addresses Co-Star Kevin Spacey: "I Didn't Know Him"," 9 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

7 Nov 2018

Look-up Popularity

Time Traveler for series

The first known use of series was in 1611

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More Definitions for series



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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something that serves to warn or remind

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