noun

1. A work, such as a work of fiction, published in installments, often numbered and without a specified end.

2. A publication issued in successive parts, often numbered and with no predetermined end.

3. A serial number, esp. one required to activate software.

   “Go to these sites for serials, cracks and keygens.”

verb

1. To assign a serial number to (especially of aircraft)

adjective

1. Having to do with or arranged in a series.

   “He was a serial entrepreneur, always coming up with a new way to make cash.”

2. Published or produced in installments.

Synonyms: sequential