Learner's definition of SERIES
1 : a number of things or events that are arranged or happen one after the other— usually singular— often + of
a series of experiments/explosions
We've had a series of problems with our computer network.
an unusual series of events
2 a : a set of regularly presented television shows involving the same group of characters or the same subject b : a set of books, articles, etc., that involve the same group of characters or the same subject 3 sports : a set of games that are played between two teams one after the other on different days
: one after the other in a particular order