(1)   (mathematics) the sum of a finite or infinite sequence of expressions
(2)   A periodical that appears at scheduled times
(3)   A serialized set of programs
"A comedy series"
"The Masterworks concert series"
(4)   (sports) several contests played successively by the same teams
"The visiting team swept the series"
(5)   Similar things placed in order or happening one after another
"They were investigating a series of bank robberies"
(6)   A group of postage stamps having a common theme or a group of coins or currency selected as a group for study or collection
"The Post Office issued a series commemorating famous American entertainers"
"His coin collection included the complete series of Indian-head pennies"
(7)   (electronics) connection of components in such a manner that current flows first through one and then through the other
"The voltage divider consisted of a series of fixed resistors"


  1. A number of things that follow on one after the other or are connected one after the other.
  2. A television or radio program which consists of several episodes that are broadcast in regular intervals
    Friends was one of the most successful television series in recent years.
  3. 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.
    The third series of Friends aired from 1996 to 1997.
  4. The sum of the terms of a sequence.
  5. A group of matches between two sides; the aim being to win more matches than the opposition

Usage notes

In the United Kingdom, television and radio programs 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.



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