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series

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A series is a group or number of people or things which are related, similar or produced together. (noun)

An example of series is the set of Harry Potter books.

See series in Webster's New World College Dictionary

noun pl. series

a group or number of similar or related things arranged in a row: a series of arches
a group or number of related or similar persons, things, or events coming one after another; sequence; succession
a number of things produced as a related group; set, as of books or television programs, related in subject, format, etc., or dealing with the same characters
Bowling a set of three consecutive games
Elec. an arrangement of devices in a circuit, in which the current flows sequentially through a series of components: used chiefly in the phrase
Geol. a subdivision of a system of stratified rocks, consisting of the rocks laid down during a geologic epoch
Math. the sum of a sequence, often infinite, of terms usually separated by plus signs or minus signs (Ex.: 1 + 3 + 5 + 7)
Rhetoric a group of successive coordinate elements of a sentence

adjective

Elec. designating or of a circuit in series

See series in American Heritage Dictionary 4

(sîrˈēz)

noun pl. series series

A number of objects or events arranged or coming one after the other in succession.
A set of stamps, coins, or currency issued in a particular period.
Physics & Chemistry A group of objects related by linearly varying successive differences in form or configuration: a radioactive decay series; the paraffin alkane series.
Mathematics The sum of a sequentially ordered finite or infinite set of terms.
Geology A group of rock formations closely related in time of origin and distinct as a group from other formations.
Grammar A succession of coordinate elements in a sentence.
a. A succession of usually continuously numbered issues or volumes of a publication, published with related authors or subjects and similar formats.
b. A succession of regularly aired television programs, each one of which is complete in and of itself.
a. Sports A number of games played by the same two teams, often in succession.
b. Baseball The World Series.
Linguistics A set of vowels or diphthongs related by ablaut, as in sing, sang, sung, and song.

Usage Note: Series is both a singular and a plural form. When it has the singular sense of “one set,” it takes a singular verb, even when series is followed by of and a plural noun: A series of lectures is scheduled. When it has the plural sense of “two or more sets,” it takes a plural verb: Two series of lectures are scheduled: one for experts and one for laypeople.

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