1. (电视或广播的)连续剧;(报纸或杂志上的)连载小说
A serial is a story which is broadcast on television or radio or is published in a magazine or newspaper in a number of parts over a period of time.

2. 连续的;连环的
Serial killings or attacks are a series of killings or attacks committed by the same person. This person is known as a serial killer or attacker.

1. a periodical that appears at scheduled times

Synonym: seriesserial publication

2. a serialized set of programs

e.g. a comedy series
the Masterworks concert series

Synonym: series