[n] (mathematics) the sum of a finite or infinite sequence of expressions
[n] a periodical that appears at scheduled times
[n] a serialized set of programs; "a comedy series"; "the Masterworks concert series"
[n] (sports) several contests played successively by the same teams; "the Yankees swept the series"
[n] similar things placed in order or happening one after another; "they were investigating a series of bank robberies"
[n] 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"
[n] (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"