1. adjective /sɪəɹiːəɫ/
a) Having to do with or arranged in a series.
The had a string of victims across seven states.
b) Published or produced in installments.
2. noun /sɪəɹiːəɫ/
a) A work, as a work of fiction, published in installments, often numbered and without a specified end.
Go to these sites for serials, cracks and keygens.
Wikipedia foundation.