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.
See More
Recent Examples on the Web The Ohio High School Athletic Association released a series of questions and answers July 31 to help athletes, coaches, parents and fans regarding return to play. Scott Springer, The Enquirer, "OHSAA releases Q&A answering questions on fall sports starting Aug. 1," 1 Aug. 2020 The capsule will then deploy a series of parachutes to slow its descent. Jackie Wattles, CNN, "NASA-SpaceX mission: Astronauts prepare to board Crew Dragon from the ISS," 1 Aug. 2020 On Friday afternoon, Tucson Sector Chief Roy Villareal published a series of tweets about Border Patrol's actions in Arivaca. Rafael Carranza, The Arizona Republic, "Border agents raid migrant aid camp in Arivaca for second time, group claims retaliation," 1 Aug. 2020 The final bill may be a compromise deal reached with Democrats on unemployment insurance, a broader deal, or a series of amendments, any of which would also require 60 votes. Grace Segers, CBS News, "Democrats reject White House offer for short-term extension of unemployment benefit," 31 July 2020 In the summer of 1975, Bass engineered a series of trades that brought Gale to the Spurs along with Larry Kenon and Billy Paultz. Tom Orsborn,, "Former Spurs teammates recall Mike Gale’s defense, upbeat personality," 31 July 2020 Now, San Francisco’s beloved legacy bars face a series of brain-breaking riddles: What does social distance mean at a business whose product is close-up human connection? Taylor Kate Brown,, "Bay Briefing: Wildfire smoke + COVID-19: A dangerous combination," 31 July 2020 Based on the lowly Ford Fusion, the Lincoln MKZ is a throwback to those lousy years when Lincoln dumped all its good names in favor of a meaningless series of letters. John Pearley Huffman, Car and Driver, "These Vehicles Are Dead for 2021," 31 July 2020 The Rupp comments come from a series of interviews housed in the UK library system’s Louie B. Nunn Center for Oral History. Jon Hale, The Courier-Journal, "Why did it take so long for Adolph Rupp to sign a Black player? Listen to his explanation," 31 July 2020

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.

See More

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

Keep scrolling for more

Learn More about series

Time Traveler for series

Time Traveler

The first known use of series was in 1611

See more words from the same year

Statistics for series

Last Updated

4 Aug 2020

Cite this Entry

“Series.” Dictionary, Merriam-Webster, Accessed 4 Aug. 2020.

Keep scrolling for more

More Definitions for series


How to pronounce series (audio)

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

Keep scrolling for more

More from Merriam-Webster on series

Thesaurus: All synonyms and antonyms for series

Spanish Central: Translation of series

Nglish: Translation of series for Spanish Speakers

Britannica English: Translation of series for Arabic Speakers

Comments on series

What made you want to look up series? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

July 2020 Words of the Day Quiz

  • papercraft sunset
  • Which is a synonym of mien?
Spell It

Can you spell these 10 commonly misspelled words?

Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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