(n)series(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”
(n)seriesa 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”