SERIAL

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.

verb

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

adjective

1. Having to do with or arranged in a series.
2. Published or produced in installments.