from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A person who attacks and kills victims one by one in a series of incidents.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A person who commits multiple (more than two) murders, especially similar ones with no obvious motive over a period of time with a "cooling-off" period between each murder.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. someone who murders more than three victims one at a time in a relatively short interval
Sorry, no etymologies found.