ETYM Latin, he who limits or sets bounds.
One who, or that which, terminates.

1. A character that indicates the end of a string, such as the null character in an ASCIIZ string. See also ASCII, ASCIIZ string.
/> 2. An item of hardware that must be installed in the last device in a daisy chain or bus network, such as Ethernet or SCSI. The terminator caps the end of a cable in a bus network in order to keep signals from bouncing back along the line. See also terminator cap.