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See also: séries, seríes, sériés, and sèries



Borrowed from Latin series, from serere (to join together, bind).


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series (plural series)

  1. A number of things that follow on one after the other or are connected one after the other.
    Synonyms: chain, line, sequence, stream, succession
    • 1963, Margery Allingham, chapter 19, in The China Governess[1]:
      When Timothy and Julia hurried up the staircase to the bedroom floor, where a considerable commotion was taking place, Tim took Barry Leach with him. […]. The captive made no resistance and came not only quietly but in a series of eager little rushes like a timid dog on a choke chain.
    • 2013 June 28, Joris Luyendijk, “Our banks are out of control”, in The Guardian Weekly, volume 189, number 3, page 21:
      Seeing the British establishment struggle with the financial sector is like watching an alcoholic […].  Until 2008 there was denial over what finance had become. When a series of bank failures made this impossible, there was widespread anger, leading to the public humiliation of symbolic figures.
    A series of seemingly inconsequential events led cumulatively to the fall of the company.
  2. (broadcasting, US, Canada) A television or radio program which consists of several episodes that are broadcast in regular intervals
    Synonyms: show, program
    “Friends” was one of the most successful television series in recent years.
  3. (broadcasting, Britain) A group of episodes of a television or radio program broadcast in regular intervals with a long break between each group, usually with one year between the beginning of each.
    Synonyms: season (North America)
    The third series of “Friends” aired from 1996 to 1997.
  4. (mathematics) The sequence of partial sums of a given sequence ai.
    The harmonic series has been much studied.
  5. (cricket, baseball) A group of matches between two sides, with the aim being to win more matches than the opposition.
    The Blue Jays are playing the Yankees in a four-game series.
  6. (zoology) An unranked taxon.
  7. (botany) A subdivision of a genus, a taxonomic rank below that of section (and subsection) but above that of species.
  8. (commerce) A parcel of rough diamonds of assorted qualities.
  9. (phonology) A set of consonants that share a particular phonetic or phonological feature.

Usage notes[edit]

  • In the United Kingdom, television and radio programs (spelt in Commonwealth English as "programmes") are divided into series, which are usually a year long. In North America, the word "series" is a synonym of "program", and programs are divided into year-long seasons.
  • (mathematics): Beginning students often confuse series with sequence.

Derived terms[edit]

Related terms[edit]



series (not comparable)

A series circuit
  1. (electronics) Connected one after the other in a circuit.
    You have to connect the lights in series for them to work properly.


Further reading[edit]





  1. second-person singular conditional form of ser





  1. Plural form of serie



From serō (to bind).



seriēs f (genitive seriēī); fifth declension

  1. a row
  2. a succession
  3. a series
  4. a chain


Fifth declension.

Case Singular Plural
nominative seriēs seriēs
genitive seriēī seriērum
dative seriēī seriēbus
accusative seriem seriēs
ablative seriē seriēbus
vocative seriēs seriēs



  • series in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • series in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • du Cange, Charles (1883), “series”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
  • series in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette




  1. plural of serie




  1. indefinite genitive singular of serie