Tra từ series - Từ điển American Heritage Dictionary 4th

se·ries (sîrʹēz)n. pl. series
1. A number of objects or events arranged or coming one after the other in succession.
2. A set of stamps, coins or currency issued in a particular period.
3. Physics & Chemistry. A group of objects related by linearly varying successive differences in form or configuration:
a radioactive decay series; the paraffin alkane series.
4. Mathematics. The sum of a sequentially ordered finite or infinite set of terms.
5. Geology. A group of rock formations closely related in time of origin and distinct as a group from other formations.
6. Grammar. A succession of coordinate elements in a sentence.
7.
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.
8.
a. Sports. A number of games played by the same two teams, often in succession.
b. Baseball. The World Series.
9. Linguistics. A set of vowels or diphthongs related by ablaut, as in sing, sang, sung, and song.Idiom:in series
In an arrangement that forms a series. [Latin seriēs, from serere, to join. See ser-² in Indo-European Roots.]
Synonyms: series, succession, progression, sequence, chain, train, string
These nouns denote a number of things placed or occurring one after the other. Series refers to like, related, or identical things arranged or occurring in order: a series of days; a series of facts. In a succession the elements follow each other, generally in order of time and without interruption: a succession of failures. A progression reveals a definite pattern of advance: a geometric progression. In a sequence elements are ordered in a way that indicates a causal, temporal, numerical, or logical relationship or a recurrent pattern: a natural sequence of ideas. In a chain the elements are closely linked or connected: the chain of command; a chain of proof. Train can apply to a procession or to a sequence of ideas or events: a train of mourners; my train of thought. A string consists of similar or uniform elements likened to objects threaded on a long cord: a string of islands; a string of questions.
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.