n.[C][M]

1. 连续；系列[（+of）]
   Then began a series of wet days that spoiled our vacation.

   之后就是一连串的下雨天，把我们的假期弄得一团糟。

2. （邮票）套；丛书；辑；组
   This publishing firm is planning a new series of school textbooks.

   这家出版公司正打算出一套新的系列教材。

3. （棒球等的）连续比赛
4. 【数】级数
5. 【电】串联
6. 【音】（十二音体系中的）序列
7. 【语】一组交替元音

n.

1. a number of similar or related things coming one after another.
   ▸a set of books, periodicals, etc., published in a common format.
   ▸a set of stamps, banknotes, or coins issued at a particular time.
2. a sequence of related television or radio programmes.
3. Music  another term for tone row.
4. [as modifier] having or denoting electrical components connected in series.
5. Geology  a range of strata corresponding to an epoch in time, being a subdivision of a system and itself subdivided into stages.
6. Mathematics  a set of quantities constituting a progression or having values determined by a common relation.