serial (serials plural )
1 n-count 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.
...one of BBC television's most popular serials, Eastenders..., Maupin's novels have all appeared originally as serials.
2 adj 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. ADJ n The serial killer claimed to have killed 400 people.
serial number (serial numbers plural )
1 n-count The serial number of an object is a number on that object which identifies it.
oft with poss
...the gun's serial number., ...your bike's serial number...
2 n-count The serial number of a member of the United States military forces is a number which identifies them.
serial port (serial ports plural )A serial port on a computer is a place where you can connect the computer to a device such as a modem or a mouse. (COMPUTING) n-count