noun, often attributive
se·​ries | \ ˈsir-(ˌ)ēz How to pronounce series (audio) \
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 new Conjuring offering — produced, in line with the rest of the series, by James Wan — is, like the other films, based on a real case handled by the Warrens, in which the man’s attorney indeed claimed that accused was possessed by the devil. K. Austin Collins, Rolling Stone, 4 June 2021 After being outscored 18-4 in the first three games of the series, the Red Sox avoided a sweep at Houston with a 5-1 win over the Astros on Thurdsay., 4 June 2021 Seeing Wrex evolve from a self-serving mercenary to a passionate leader of an entire people is one of the most satisfying character arcs of the series. Jhaan Elker, Washington Post, 4 June 2021 Indeed, central to the mission of the series at large is an interrogation of both the connections and the gaps between both cultures. Marley Marius, Vogue, 3 June 2021 Their full-on belief in one another is one of the more deeply romantic aspects of the series, especially in a genre that often features one character begging another to believe them before it’s too late. Lillian Brown, Vulture, 3 June 2021 With David Bertans out the rest of the series with a strained right calf, Raul Neto got the start. ... Dan Gelston, ajc, 3 June 2021 Norman Powell must hit some big shots: The first close game of the series included several opportunities for Powell and McCollum to come up huge. oregonlive, 3 June 2021 The Knicks beat them in all three meetings during the regular season and the teams split the first two games of the series in New York. Brian Mahoney, Star Tribune, 3 June 2021

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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Last Updated

6 Jun 2021

Cite this Entry

“Series.” Dictionary, Merriam-Webster, Accessed 13 Jun. 2021.

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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 How to pronounce series (audio) \
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 How to pronounce series (audio) \
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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