Definition of “series”

noun

1. a group or connected succession of similar or related things, usually arranged in order
2. a set of radio or television programmes having the same characters and setting but different stories
3. a set of books having the same format, related content, etc, published by one firm
4. a set of stamps, coins, etc, issued at a particular time
5. mathematics the sum of a finite or infinite sequence of numbers or quantities See also geometric series
6. electronics 
   1. a configuration of two or more components connected in a circuit so that the same current flows in turn through each of them (esp in the phrase in series)
   2. ((as modifier)  ⇒ a series circuit Compare parallel (sense 10)
7. rhetoric a succession of coordinate elements in a sentence
8. geology a stratigraphical unit that is a subdivision of a system and represents the rocks formed during an epoch